"Thinking with laser reflective boxes" is the operative phrase for the video found after the break, featuring Portal 2's 20th test chamber being conquered both quickly and without the use of a single portal. The speedruns have begun!
Portal 2 is the sequel to 2007's Game of the Year and draws from the award-winning formula of innovative gameplay, story, and music that earned the original over 70 industry accolades. Features single and multiplayer co-op modes.
