Games included in The Black Box compilation: Half-Life 2: Episode Two - the second installment in Valve's episodic trilogy advances the award-winning story, leading the player to new locations outside of City 17. Portal - a pioneering type of single player action game that rewrites the rules for how players approach and manipulate their environment. Team Fortress 2 - an all-new version of the legendary title that spawned team based multiplayer action games.