A literal prequel to Quake 2 and Quake 4, and a spiritual successor to Wolfenstein: Enemy Territory, "Enemy Territory: Quake Wars" is a team-and-class-based first person shooter.

GameTap is an online gaming service provided by TBS with a huge range of games available for only $60 a year. That fee gets you unlimited access to over 1000 games of many different varieties.

A turn-based strategy game similar to X-Com or other games of that sort, "Jagged Alliance 2 Gold" (re-released 2004) puts the player in control of a band of mercenaries to liberate an island nation from its oppressive queen.

Considered one of the most well-written games of all time by most reviewers, Planescape: Torment is now available for download through GameTap. With this, it is possible for people on newer computers to run this old, but beloved, game.

The fourth entry in Sid Meier's globe-and-history-spanning empire-building simulation game, Civilization IV is the latest refinement of the Civilization formula. Rather than introducing a lot of new features, Civilization IV tends to stick with the tried-and-true aspects of the series.

A sim game set on an alien space station, StarTopia also has a great Douglas-Adams style sense of humor.