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F.E.A.R.(First Encounter Assault Recon) is a first person shooter from Monolith Productions. In F.E.A.R., you are a member of an elite special forces team dedicated to combating paranormal threats. A mysterious army of clone soldiers infiltrate a multi-billion dollar aerospace compound, and you are sent in to investigate and eliminate the leader of the clone army, Paxton Fettel, before the situation spirals out of control.

Worms: Armageddon is a turn-based strategy game from Team 17 and MicroProse. You command a squad of worms and must take out one or more opposing squads using an array of heavy weaponry ranging from bazookas and grenades to nukes and doomsday devices.

Half-Life 2 is an FPS from Valve Software, and was one of the most highly anticipated sequels of all time. You return as Gordon Freeman, the strong and silent-type physicist, and you must do battle with an alien race of enslavers to liberate the surviving remainder of humanity on earth.
Also applies to Half-Life 2 Lost Coast free downloadable level.

The Bard's Tale is an action role-playing game created by InXile Entertainment, and published by Vivendi Universal Games in 2004. Vivendi marketed the game as a humorous spoof of fantasy role-playing video games. It is neither a remake nor a sequel to Interplay Productions' Tales of the Unknown, Volume I: The Bard's Tale (1985)

(Source: Wikipedia)