WARNING: YAAFG (yet another addictive flash game)
Ran into this over the weekend. The original Portal is a game by the people who made Half-Life. Basically there are a bunch of different rooms you need to get through and the only weapon you have is a little gun that can shoot a portal on to certain surfaces. Anyway, the real version looks awesome, but for those of you looking to waste a bit of time at work, the people from We Create Stuff. have built a Flash version that’s pretty awesome.