Antichamber, the new first-person puzzler from the designer Alexander Bruce, might be the trippiest gaming experience since Portal. Bruce describes the game as "a mind-bending psychological exploration game where nothing can be taken for granted. Discover an Escher-like world where hallways wrap around upon each other, spaces reconfigure themselves, and accomplishing the impossible may just be the only way forward." Sounds good to us.
Antichamber is available now on Steam.