We found this stray wandering around the TIGForums and decided to take it home with us. The Triumph of Time is a realtime puzzle/strategy game thing set in space, with antimatter steadily encroaching upon your solar system and trying to devour all that you know and love. The premise sounds simple enough (and hey, the game really only has a few puzzle elements) but they combine quite wonderfully to promote genuine thinky-ness.
This is a polished version of a former Ludum Dare entry (with the theme “Advancing Wall of Doom”) and it must be said that the level of care involved with the level design has been quite admirable. Get a direct download of the game from here.