Day 2's special deals include:
Dishonored - 50% - $29.99
Darksiders Franchise - 66-75% - $4.99-16.99
Tom Clancy Franchise - 31-75% - $2.49-14.99
Fear Franchise - 75% - 2.49-4.99$
Sim City 4 - 75% - $4.99
Psychonauts - 75% Off - $2.49
Of these only Psychnauts is compatible with Steamplay (Win + Mac). If you like platformers and haven't played it - it is excellent!