In the Osprey Helecotper, Adrian is listening to conversations between his platoon. The Captain gives out the orders when suddenly, Alien aircraft attacks the nearby Osprey! The situation is hot, and then Adrian's Osprey is next, bringing it down and knocking him out cold. At the ground, he sees his men fight the aliens, and then becomes unconscious again. He then sees a Medic trying to protect him, and then he falls asleep again.

A Scientist then recovers him. Adrian is in the Infirmary section of Black Mesa. Go out the door and search the area. One of the areas contains a few Scientists toying around with Headcrabs. The dark one is facinated by the mutations Headcrabs cause. Pick up the P.C.V and advance. Run away from the Zombie that throws the Cleansuit Scientst through the glass. Go through the damaged door to find a fat Security Guard shooting a Zombie. He then will open the door for Adrian to advance (provided that he gets his P.C.V first). In the damaged hallway, grab the Wrench and use it to destroy some glass mirrors in the next room. This will make the laser backfire onto its generator, allowing Adrian to go up the stairs.

Here, avoid the Headcrabs hidden among the corners and jump over the Waste. On the other side of the locked door is a man in a tuxedo carrying a Briefcase. This is the G-Man, who seems to be interested in Adrian's progress. Smash the crates for some supplies underneath the stairs, and then go up it to where more boxes are. Smash them.

Outside, jump across the chasm. At the other end, grab the Dagger on the Vortigaunt corpse and jump across the gap in the bridge. This is where the Medic healed Adrian. Kill the Headcrab here, and go through the small hole to where Adrian had laid dizzy. The other side of the fence is blocked by electricity. The tunnel leads to the generators. In the tunnel, smash all the Headcrabs that come out of the walls, and move on. Smash the crates here, and witness a Guard attempting to get out of the yard by climbing the fence. He then gets electrocuted. Crouch into the vents and avoid the electricity in the generator to the other side. Once inside the yard, avoid the generators and find the power box. Use the lever to turn it off, turning off the electricity at the previous fence too. Collect the Deagle and return back to the destroyed Osprey. In the tunnel, some Vortigaunts will spawn. Shoot them both.

Back at the Osprey, go to the other side, search the boxes for supplies, and use the radio. The message says that the Army is pulling out and that they are waiting for Adrian at the LZ. Adrian needs to use the sewers if he's going to get there. Climb down the ladder and kill the Barnacles at the ceiling. Go down the ladder to find some more 357 ammo. Continue across the paths.

Eventually, Adrian will come across another Vortigaunt. Shoot it and nab the SPAS-12 from the corpse. Go down the ladder, killing any aliens and avoiding any steam. At the end, a lift will go down with a pair of Vortigaunts. Shoot them! In the large room, Adrian will attempt to get to the other end, but the room will start to explode! Go the left and avoid the Radiation. Pretty soon, the Radiation will rise. Fortunately, a part of the catwalk falls down, allowing Adrian to climb up to the top. The G-Man comes by at the control pannel and saves Adrian's hide by opening the door. Go through it fast and to the elevator.

There's more of that green stuff here, but it's not as lethal as the last pool. Collect the stuff at the boxes and jump across the river. Break the boxes and search the area for supplies and Headcrabs. At the control panel, transfer the lift to the left, so that it lines up with some green boxes and the switch. Jump onto the boxes and across the lift, and activate the switch. Then jump across the radiation and to the new area.

Here, activate the gates so that they will open, and go through the pipe into the sewers. Here, swim to a ladder, avoiding the Barnacles, and through the hallways. There's more Barnacles on the ceiling. Across the bridge to the right is some 357 ammo and a package of Grenades. At the room, notice the notice saying "No Entry Until Robot Finishes Procedure". Throw a grenade at the explosive boxes blocking the yellow Robot's path. It will complete putting down a box, and then the lower area will be accessible. Jump across the boxes and activate the engine so that the Radiation level will drop to nothing. Go across the pavement and up the lift. Here, kill the Houndeyes and pass the table with the plank towards the Tram. Then jump onto it.

The Tram will transport Adrian towards the LZ. Meanwhile, some Vortigaunts infest the area, so duck and dodge their attacks. When Adrian gets to the end of the Tram, collect the Glock and shoot the Vortigaunts that spawn near the Tram. Go to the next area with vending machines. A Security Guard is struggling with one of them. Ask him to follow and go through the hallways, killing any Hostiles. At the end, look through the window, and observe an unknown alien kill a Security Guard and a Scientist. Collect the gun and open the door for the alive Guard to get through. He'll open a closet with ammo. Meanwhile, smash a window to a room with a scared Scientist. Ask him for healing if necessary.

Go up the lift. It's too late to save this poor Soldier, so avenge him on those Vortigaunts in front. Grab his weapon and collect the supplies here. Also, charge up on the Charging Station, and then hop on top and break the vent. Go through and up to the top. Adrian has reached the LZ! Go through the door and talk to the Commander (he's got the same voice as the guy who spoke to "Cooper" in the original Half-Life!). He says that Adrian will need to hurry to the Osprey for extraction. Go through the door to find some ammo on the desks and a Soldier interrogating a Scientist. Get past him and collect the Batteries. Then go through the vent (or stairs) and to the Hangar. Unfortunately, the door locks, and the G-Man stares at Adrian. The Osprey is gone, but Aliens pop up from nowhere! Slaughter them all and go through the hole.

Keep going through the narrow way and fight the aliens here. Grab the ammunition and head for the vents. Before going down, however, there's more 9mm ammo if Adrian goes across to the next grate. Go down and avoid the ceiling tiles that look a bit discoloured. If stepped on, they will collapse, sending Adrian to an electrified pool. Jump across the "gap" and towards the fans. Walk across the narrow I-beams, and don't fall into the fans. At the end, the fan on the right is broken. Dodge its single blade and into the vent.

In the furnace area, there's some firey engines on. Dodge the fire on the first one. Jump over the second. Kill the Gonome and Headcrab, and smash the boxes. Go through the vent to find another few furnaces. Dodge the first one. When the second one is inactive at this point, run through its path to the left. Get out of the way before the next round of fire comes! Here, there's some Zombies and Gonomes to be taken care of. Collect the supplies and move the box of explosives next to the furnace. Then go up the ramp to the panel and activate the flames! Move down and kill the Gonome and Headcrabs. Go through the vent and reach the garage area.

A wounded soldier crawls out of the entrance. First, go down to the second story of the structure and search the vents for supplies. Then talk to the Soldier. He says that there's "things" in the garages, and says that Adrian must escape. He then passes away. Here, search the area for boxes to smash. One of the areas contains some Pit Drones. Kill them. On the other side of the garage door on the left is some more Pit Drones. After they're dead, search the Truck for a useless Tripmine, then search the crates for a Bazooka.

Advance to where some Pit Drones are about to attack a Scientist. Take them down and ignore the civilian. In the elevator shaft, go down with the ladders, and go to the lower level. Here, search for a storage room that contains a switchbox that will turn off the electricity. Return back to the shaft and go up to where a rope is. The now-safe rope can be climbed up towards the elevator. Inside is some Batteries. Then go through the door.

Push the Metal crate underneath the vent grate. Break it and enter. As Adrian crawls through, the vent will break. Kill the Bullsquid behind and take some 9mm ammo, and then go through the hole in the wall. To the right is the familiar crate. Push it to the debris. Climb it and throw a grenade towards the explosives in the small office room. This will blow up a wall, allowing the crate to get through. Push it to the next vent and crawl through.

At the end of the small vent is a shocked and dead Scientist. Go down a hole in the floor to find an alive Scientist. Grab the Batteries, turn off the electricity, and climb the rope. There's a radio and a few corpses on Adrian's left. Use the radio to contact a few fellow Soldiers and they'll bust a door open. The Engineer and the Shotgun Grunt are very concerned to get out of this mess. Use the former to break the door to the elevator, and have the latter follow.

The area at the top of the elevator is loaded with hostile Vortigaunts! Support Adrian's fellow troops and use the Engineer to breach the door for some ammo. Go up the stairs to find another Vortigaunt that breaks a door. Shoot it and the ones in the nearby offices. There's some blueprints for the Displacer. In the large, vacant room, some more Aliens will spawn! Shoot them all to death. To the right is the briefing room, with lots of Vortigaunts. After sending them all down to Davey Jones' Locker, another part of the wall will bust. Clear the Vortigaunts in this area. Advance right, dodging the smoke, towards what seems to be a mortar attack on this area.

Climb up the debris, avoiding the Barnacles. In the next area is a pair of Vortigaunt Soldiers. Shoot the explosive Boxes with the Deagle, and jump across the ropes quickly. Collect the supplies and move up the elevator. Kill the Houndeyes here, collect the dough, and listen to the Radio message about the Black Ops. Go up the broken pole towards the surface. The Medic claims that the door leads to the Lambda Sector, where he, Adrian, and any other Soldiers can use to get out to safety. With any luck, they can get an encounter on Adrian while they're at it...

Unfortunately, this door is too tight, so Adrian needs to find an Engineer. The door leads to a Turret. Blast it with a Grenade and throw another one across the corner. This will detonate the Tripmines. Go into the vent and listen to the two Black Ops' conversation. Ambush them and take down any reinforcements. Behind the garage door is an Engineer who has been interrogated by the traitors. Go through the small door and ask the Medic to heal the Engineer. Clear the crates for some stuff and use the Engineer to breach the door.

Attack the Turret behind the door! Blow up the Tripmines blocking the way and move down. There's another pair of Soldiers, one with an M249. They are very angry at the Black Ops, and are willing to join on Adrian's adventure. To the left is a room with some Female Assassins. Help Adrian's platoon to kill them, and then go up the balcony and open the train doors. Lead the team towards some more Black Ops! After securing the first area before the set of rails, collect the supplies. The next area isn't easier to secure. After killing anything in black, search the area for more needy supplies. Go up the stairs to find some controls that will lead to the Lambda Sector. Adrian's squad will decide to wait here, so he can slay the guy with the M249 if he wants to (out of the sight of the other men of course). Use the train and move through the new area (after switching the course).

Dodge any dangers and kill the Male Assassin at the station. Search the room for some ammo and go up the broken pipe into a vent.

Adrian will hear a Scientist yelling for someone to hurry. Use the Stations and then go through the door. Adrian will witness Adrian jumping through the Portal. Don't follow him. Instead, go to where the catwalk collapsed and go through the Portal that spawned there.

Welcome to Xen Adrian! Yes, I know, it's quite a dump. Jump down to the lower platform where a corpse lies. Collect the Supply cache and then use the jump pad to launch Adrian up to the higher platforms. Jump across to the next one to find a Scientist that falls through a telelportation accident. A Displacer also falls down here. Grab it and use the secondary trigger. Adrian will find himself in the Black Mesa Hazard Course. Shoot the Vortigaunt next to Gina's hologram and the one at the other end. Grab the dead Guard's Shotgun and go to the observation area. There's the exit Portal here, along with a First Aid Station. Return back and jump across the platforms, killing the Houndeyes on one. Use the Jump Pad on this platform towards the Portal at the top surrounded by a ring of asteroid things.

Adrain spawns in the middle of an underwater labratory. He must get back to the surface! Go down the elevator and to the left at the bottom. Here, Adrian must kill the Pit Drones in this area and free the Scientist from the chamber. Use the Charging Stations and make the Scientist follow. He'll open the door on the other side for Adrian to get through. Kill the Bullsquid on the water, and grab the Cell Ammunition. When the Scientist tries to open the next door, he gets electrified! Adrian will need to find another way to get past that door. Get into one of the broken aquariums and climb the ladder, where a hapless Security Guard gets killed by more of those annoying Pit Drones. Strike them all down without mercy, and more will come out of the ceiling and walls. Shoot them and get through the hole in the wall. Another Pit Drone hides among the small vents. Enter the far vent to get to the other side of the door.

Adrian should now be on the other side of the door. In this room, there's a teleporter chamber. Before entering it though, there's some Cell Ammunition in this room. Enter it, and watch as the teleporter malfunctions, missing Adrian a few times. He gets teleported into a body of water on the other side. Swim to a vent entrance and fight the Headcrabs and Zombies in this corridor. Go through the vent and into another body of water.

In this area, the place is filled with Headcrabs and Zombies, and a Gonome! Smash them all and use the H.E.V Charging Station. The First Aid Station is broken, but there's a Medkit next to the dead Scientist. Go down the ladder and use the wheel. This will open a grate leading to an airlock. Swim over to there (ignore the Ichthyosaur, it won't attack unless Adrian attacks it). Get into the airlock and turn the wheel in order to remove all the water.

On the other side, there's an electrocuted X-Ray. Adrian can't turn it off with the button. Shoot its power box in order to turn it off. After, some Pit Drones and a Shock Trooper spawn in this room. Kill them all and the Shock Roach. Grab the supplies here and move onto another airlock. Get into the Portal and Adrian will be in the same spot where he would spawn when he uses his Displacer. Jump to the other platform and towards a huge aquarium. Get into the water and up the vent, where some wires and tubes are. Move straight forward.

Head up the pipe and kill all the Headcrabs in this room. Grab the supplies here and head upward, towards a park. Get to the other side of the corridor. It's locked, but when Adrian tries to return, some Pit Drones and a Shock Trooper spawn here! Kill them all and go through the glass window they just broke. In the park, a Voltigore appears! Use the Deagle or Displacer on it. Then enter the elevator. Here, there's some Xen creatures being held in cages and the like, but there's a Gonome that's a much bigger concern to Adrian. In one of the chambers, there's 10 Snarks that can be accessed by opening the chamber.

Exit the room to a corridor. There's a First-Aid Station here. In the same corridor, there's an elevator that's out of order. Jump through its top and climb the ladder in the shaft. At the top, jump on the broken door on the higher floor (don't worry, it won't tip over). Then explore the corridor on this level. It's pretty much an industrial area. There's another similar elevator on this floor. Enter it and make it go back down. At the bottom, get through the left door, and kill all the Pit Drones here. Break the boxes. In the vent, there's another package of Snarks, but Adrian must kill the active ones first. Smash the window, and get outside, to the infested observation garden. Kill all the Xen aliens here, and grab the Spores provided (they will somewhat prove useful). Enter the elevator.

At the top, one of the Race X specimens have broken out of their glass chamber. Grab it. This is the Spore Launcher, which can make use of the Spores collected earlier, and there will be more of them! Nearby, Adrian will hear a Gonome breathing. Destroy it and advance on. A light will guide Adrian to the next area. In this room there's some Houndeyes. The next area has some windows showing some Barnacles hanging in a vacant chamber. Press the button on the big machine to activate a pre-recorded message. The halogram Scientist says that Black Mesa has been toying with the Barnacles, but so far, they have only made them become grapples that only connect to "Organic Material". One of them is located in cage 1176. After the message, the door will open, leading to the specimens. Grab the Barnacle Grapple, Adrian will need it!

In the next room, Adrian can test his new toy. Small targets, like Headcrabs, can be pulled towards Adrian. Larger targets, like Houndeyes, will make Adrian get pulled towards the target. Either way, the target will meet an unfortunate demise.

In the next area, the bridge is broken, and Pit Drones and Spores infest this room. Dispatch the Pit Drones and collect the Spores. Use the Grapple on one of the Spores on the other side to get across (this also works on the green stuff on the walls). Keep advancing. Adrian will come across the Chamber of Barnacles he saw earlier. Kill the Headcrabs and the Barnacles, and go up the elevator.

Annihilate the Shock Trooper and the Pit Drones in the next room. Collect any supplies and head up the elevator. There's some more Pit Drones and a Shock Trooper. The room they were guarding contains boxes that contain some supplies. Return to the first room mentioned in this paragraph. Go up the stairs where the Shock Trooper was and Adrian will come to an outside area with lots of Tentacle Creatures. Try to sneak past them and use the Grapple to get to the vent in the distance. Climb in.

Turn on the radio here. The pre-recorded message says that there's a Pit Worm in the toxic area past the fan. Most of the squad there has been pinned down. Collect the supplies here, and turn off the Fan with the electrical box. Head in its vent, and Adrian will be pushed into the most hostile area yet!

Adrian falls into a pool of sludge and boxes. Break the boxes for Medkits and Batteries. The G-Man is up in the control room, and opens the door. Kill the Bullsquid in this area and advance. Open the door and climb the ladder. It seems that the Soldiers here have died here some time ago. Collect their weapons, and go to the next area.

The Pit Worm cannot be hurt by any of Adrian's weapons. Go to the right and kill all the Pit Drones here. There's a dead Security Guard here. Collect his Deagle and shoot the Pit Drones. Go through the vent and observe the panel. The Gearbox must be working and the Steam and Valve pipes must be open in order to flush this monster out!

First, on the current floor, run across the catwalk and into the airlock. Kill the Pit Drone here and decend down the ladder. Go through the door on the right and Adrian will find himself in a chamber with lots of boxes. Climb them and get to the other side. Kill all the Barnacles hanging here, and go up the elevator. The door leading to the Gearbox station is out. Destroy the Pit Drones and press the button to crush the crates. Once the process is finished, return to the box room to find some ammo and a vent grate on the floor. Break it and Adrian will fall into a body of sludge. Shatter the fancy-looking pane of glass, and go through the hallway, killing the Bullsquid. Activate the Gearbox station, and return to the body of sludge. It will rise, so Adrian should swim to the surface and back to the crate room. Return to the Pit Worm arena.

In the Pit Worm arena, go to the second catwalk from the bottom and kill the Drone. Collect the M249 round, and climb the ladder. Kill all the Drones here. On this side, open the Steam pipes. Use the Grapple to get to the Valve pipes (its ladder is broken). Return to the control room and flush that freak out!!

Once it is defeated and never to be seen again, activate the catwalk that will extend where the Worm used to be. Walk across it and advance back to Humans!

After beating the atrocious Worm, head to the sewers to find two Bullsquids, and a few Barnacles. Go to the end of the catwalk and use the Grapple on the green stuff on the ceiling. Then go up the manhole. In the red box is the M249, the ultimate heavy artillery! Use it and the MP5/M16 on the Black Ops that come out of the truck. There's another using a Turret. Blow up the explosive box behind him. To the left is a bent crate leading to the next area. The Black Ops attack Adrian. Use the M249 on them, and the Glock on the one in the Tower. Crawl through the hole.

The two friendly Soldiers are trapped here because of Snipers in the next area. Collect the supplies and enter the courtyard of the fortress. There's lots of explosive devices set around here, don't detonate them! Use the Glock on the Sniper to the right, remaining undetected. Do the same to the other one. Behind the Cammo Netting is another Sniper. Go towards his position and take down his guard. Climb up the ladder and dispatch the Sniper. Grab his M40 and its ammunition. Return back and tell the Soldiers that the coast is clear. Go to the other side of the yard and to the left. Some Male Assassins detect Adrian, so equip the M40 and use it on the bad guys that assault him and his friends.

Search the nearby building for further supplies. Check the camp for even better stuff, and then go through the garage door. Allow the Shock Troopers and Black Ops battle each other, and take down the survivors. Check the Truck for goodies, and go down the manhole, leaving the two men behind. Adrian will hear a loud explosion, and some Voltigores! This won't be easy. Use the Nightvision, and take down any of these bad spiders with the M249, the Deagle, anything that's capable of wiping the Voltigores clean! In the watery area is some Pit Drones that come out of two sewer doors. Close both and continue onward.

At the end of the sewers is a ladder leading to some good guys. The Engineer breaches the grate, and gives Adrian the small-talk. Apparently, there's a Dam where some of their mates are in trouble. They should head there. The squad here consists of a HW Specialist, a Medic, and the Engineer. Look out at the outside after collecting the good stuff. The explosives have been detonated, and this fortress is an even bigger mess than before! Snipe the Shock Trooper in its eye. Then use the Displacer to kill the Voltigore. Go back and hire Adrian's new sidekicks and team up against the squad of Shock Troopers. Collect the ammunition and move across the narrow lane. Keep moving across the Battlefield, and keep the Soldiers safe!

Eventually, at the end, is a door not accessible before. Go through and collect the M249 rounds. The dam explored by Gordon earlier has been infested by a Gargantua! The G-Man is on the tower. Use the Grapple to get to the other side. Once there, use the detonater to defeat the Gargantua, and then kill the Shock Troopers to prevent the Soldiers from any more trouble. Return back to the start and use the Charging Stations. Go down to where the Garg was and go down the pipes to the next chapter...

Adrian is not done here. He must prevent the evil Black Ops from blowing up Black Mesa! In the pipes, escape the sewers and try to get up on the barrel to the right. At the end is a corpse with Shotgun Shells. Go to the beaches and talk to the two Soldiers. They claim that they must fight their way through if they are to escape. Follow them and fight the Black Ops at the watery arena. There's another manning a Turret. Evade his fire and shoot him to death. More of them come. Another squad will ambush our heroes from behind, so use the Turret against them. Continue forward.

Tell the two men to hold their position. A Male Assassin has a mortar launcher at the end. Dodge the attacks and go to the side, then sniping him. Go down the destroyed building and collect the supplies if necessary. Shock Troopers will spawn here, so use the M249 to smash them to kingdom come. Allow the Soldiers to follow and get into the building on the right. Take down the Ninjas here and use the radio (allow the Soldiers to come in first). The guy says that more of those Black Ops villains are attacking their bunker. Go back out and fight the guys he mentioned, and through the bunker. The Soldier on the other side of the radio is dead (and he knew Adrian's name!). Take his Machine Gun, jump across the pipes, and crouch through. Go up the stairs, checking each floor for extras, and reach the top. Here, shoot the Vortigaunts that spawn and use the Mortar to blow up the gates blocking the doors. Once done, some Race X aliens will come out! Use the Mortar or whatever is at hand to destroy them! Once they are history, get the Soldiers out and go through the smaller door.

The next area is full of damage and Aliens. Allow the Black Ops Apache to dispatch the Aliens, then take it down with a Rocket. Inside, another Shock Trooper will engage. Go up the stairs towards the other end. Grab the Sniper Rifle rounds in the truck, and climb up the ladder. Head across and to the left is a garage with Rockets and a switch that will deactivate the electricity. The cable across the rooftops will be safe to run across. On the other roof, there's a vent entrance where Adrian should get into.

Frag all the hostiles in the garage. Then attack the Shock Trooper down the ramp. Allow the two factions in the next garage to duke it out, and then advance. More Black Ops will come down from a vent. After dispatching them and collecting any necessary junk, go up the car towards another vent, where a wounded Security Guard has listened to some of the Black Ops' plans. They are going to blow the crap out of Black Mesa; this must be stopped!

Go through the vent and to another part of the Garage, where a Male Assassin is yelling at another Security Guard behind a locked bulletproof door. Kill both of them and check the area. Talk to the Guard. He's not opening the door until the Bomb issue is resolved. The open gates to the left lead to it. One of those annoying Assassins is equiping the bomb, while another keeps watch. Launch a Grenade at them and deactivate the bomb with a single button. Return to the Guard and he'll comply. He then says that the Black Ops are now at the basement, but are now under attack by those damn Race X Aliens. Search the area for some supplies (and the G-Man observing the Bomb for some reason). Go down the elevator; don't worry about the Guard, he'll find some way to meet Adrian at the end.

At the bottom, get some good cover and take down the Black Ops one by one. After they're all killed, Adrian should bear the bad sounds of the boxes moving and attack the Assassin using the turret. Use it to take down the Ops that come in front. Then go up the crates and onto another level. Ambush the Male Assassin below. Get to the indent in the corridor once the first moving crate gets out of the way. Then make way to the other side, where some Black Ops are.

Shoot them down and advance up the elevator. At the top, there will be some crates hanging from a bar above. The path of swinging crates leads to a huge room with a fight between the Black Ops and the Race X armies. Avoid the gunfire and jump across the crates onto a steady tower of crates. Then make Adrian's way down to the bottom of the room by jumping down crates. Wait for the two armies to exhaust themselves, then take down the remaining hostiles. Somewhere in the room leads to a corridor. Go through the door to meet the Security Guard met earlier. He warns Adrian that there's another massive Alien to send back to hell. He has supplied Adrian with enough ammo to fend it off, and has activated a few charging stations if needed. Take them all and go down the elevator to see the final enemy of the game!

Down in the depths, keep running against the fan and go down the stairs, breaking the crates here. In the next room, there's a rope leading to a Healing Pool. Go to the next area where a purple Portal is absorbing some sprites. When all the sprites come through (eventually), the Gene Worm appears! Use the two Turrets on the balconies to shoot its eyes, forcing it to reveal a Portal-like object in its belly. Shoot it with the Bazooka. After this, it will release a Portal that spawns a Shock Trooper. Use a Grenade on it. Keep repeating this process until the Gene Worm is completely defeated. In this process, the Worm will break the bridge connected to both sides of the balconies. The only way to access the other side is to use the Grapple. Also, take advantage of the Healing Pool provided.

Once the Worm is killed, a Portal consumes Adrian and he is teleported onto an Osprey Helecopter, where he meets the G-Man, the guy with the briefcase. He states that he has interest in Adrian, and therefore, he keeps him in reserve, as Adrian's adventure remined the G-Man of a younger self. Adrian then goes into a black void and is not heard of ever again for the series to date...