Gunpoint. Steam is celebrating launch by knocking off a buck from the asking price until June 10, bringing Gunpoint down to $9; the special edition containing the soundtrack and in-game commentary is 25 percent off, down to $15.
Francis, meanwhile, is celebrating with an AMA on Reddit today. Within, he's confirmed first-day sales are quite encouraging - an hour ago, he claimed it was the number one game on Steam's sales charts.
Gunpoint is a Deus Ex-inspired spy game where players must rewire security systems using the Crosslink device - for example, it can be used to turn a light switch into a trap door controller. In Gunpoint, the goal is for players to infiltrate buildings and steal valuable data because spies.