Re: Post here when you beat a game. I mean it!
Chalk it up to Valve's stubborn refusal to just tell a damn story. = /
according to one of the "official" HL please-tell-me-WTF-is-going-on websites, Portal allegedly takes place in the time between HL 1 and HL 2 when Gordon was in stasis, the G-Man's briefcase, or wherever he was when the world was going to hell.
the Portal company was supposedly doing testing on (wait for it) Portals while the aliens were taking over or somesuch, and their company was a competitor with Black Mesa for some government contract or something.