[H]XCom + DLC/Entropy/Hack 'n' Slash/Dungeon Defenders + all DLCs [W]Black Mesa

XCOM: Enemy Unknown (http://store.steampowered.com/app/200510/)
XCOM: Enemy Unknown - Elite Soldier Pack
XCOM: Enemy Unknown - Slingshot Pack

Entropy (http://store.steampowered.com/app/255500/)

Hack 'n' Slash (http://store.steampowered.com/app/246070/)

Dungeon Defenders Collection (Summer-Winter 2012) (First Dungeon Defenders game + all DLCs) (http://store.steampowered.com/sub/15481/)