If so, you’ll want to visit Steam to download a free copy of Portal this weekend:
For those of you unaware of the innovative game, Portal is a first-person platformer, in which one has to solve a series of puzzles using a teleportation device.
Launched in 2007, Portal was critically acclaimed as one of the most innovative games of the year. It was followed up this year with Portal 2, which we also found rather good.
