Deus Ex titles are all 75% off this weekend on Steam, and all seasons of the Sam & Max are 66% off.
The Deus Ex Collection is 75% off and includes the Augmented Edition of Deus Ex: Human Revolution, Deus Ex: Game of the Year Edition, and Deus Ex: Invisible War.
You can also purchase each title individually for 75% off, as well as the Explosive Mission Pack, the Tactical Enhancement Pack, and the Missing Link DLC for Deus Ex: Human Revolution.
The Sam and Max Complete Pack, which includes Season One, Season Two, and The Devil’s Playhouse is 70% off.
Sam & Max: Season One and Two are both 67% off, and the The Devil’s Playhouse is 66% off.
Hit up the links for more information.