The <a href="http://www.humblebundle.com</a>Humble 2K Bundle</a> was already a good deal that saw you pay what you for Bioshock, The Bureau: Xcom Declassified and The Darkness II, you'd gain Bioshock 2, Mafia II and Spec Ops: The Line if you beat the average and if you paid $20 or more you also got Bioshock Infinite and Xcom: Enemy Unknown.
Now the Xcom: Complete Pack has been added as part of the bundle (if you beat the average) - giving you an additional 5 games - Apocalypse, Enforcer, Interceptor, Terror From the Deep and UFO Defense - from back in the day.