The Macheist 4 Bundle gives you 12 applications and games for Mac, for only $29 USD. There are 3 more games and apps that will unlock at a point when a certain amount of bundles are sold.
Three adventure games are included in the bundle: Sam & Max: The Devil's Playhouse, Strong Bad's Cool Game for Attractive People, and Jurassic Park: The Game, all of which are through Steam.
The other games and applications in the bundle are: Artboard, Bejeweled 3 (through Steam), Courier, DiscTools Pro, Evernote, HDRtist, Radium, and Scriviner. Additionally, Firetask will unlock for all bundle owners after 25,000 bundles are sold, and Bioshock 2 and Painter Lite will unlock after an unrevealed amount of bundles are sold.