Caste, this is just...amazing. One of the most clear and well-written theories among us! Everything you say is backed up with evidence. Even though I've been playing HL since 1999, I still haven't pieced together every tid-bit of information. Well done, kudos from me. I did enjoy your linking of the Nihilanth to GLaDOS - I always thought the Nihilanth was sort of left after HL1.. Do keep going. I wouldn't worry about your English grammar. There are a few corrections, but, really, it's not necessary to point them out. We get what you're saying so it's cool. Keep it up!!