Quantum Conundrum: The game will arrive on Windows via Steam on June 21. You can preorder the game right now either as a standard edition, or as a "season pass," with three exclusive Team Fortress 2 items, a downloadable soundtrack, and all of the future puzzle packs.
Preordering the game also earns you 10 percent off, and you'll be entered into a sweepstakes to win the opportunity to have your portrait hung up in the in-game world. Snazzy! Quantum Conundrum will also arrive on Microsoft's XBLA and PSN, though Square is only sticking with "summer" as a date for those versions so far.