In the first five minutes of Zachtronics' Infinifactory you're abducted, scanned, fitted with a red jumpsuit, nearly sucked out of an airlock and introduced at length to your new alien overlords. Then the real fun begins.
Infinifactory is out of Steam Early Access. Described as "like Spacechem in 3D" by, er, the creator Spacechem, Infinifactory is an excellent sandbox puzzle game about constructing factories for alien overlords. You get to solve devilish puzzles your way. It also makes for some mesmerising GIFs.