Best Games by Popularity: X

The developer of the Civilization franchise takes a shot at another cherished strategy series. Read the Review

X3: Reunion is the third installment of the action and trading simulation, X. X3: Reunion adds an expanded universe, more than 200 new models, an upgraded graphics engine, and an improved trading system that lets you leverage more advanced economic concepts such as the elasticity of demand. Read the Review

This is almost the X-COM sequel that folks have been hoping for. Read the Review

The Slingshot content pack brings a new set of linked Council missions where players will meet an enigmatic Triad operative, divert an alien ship's course, and do battle with the aliens in the skies over China. Read the Review

Put simply, X-COM is a bona fide modern classic, standing proudly alongside Civilization and Populous as a benchmark in the evolution of strategy gaming. Read the Review

X Rebirth is a space simulation game from Egosoft and Deep Silver.

X3: Albion Prelude plays in a time between the old and the new X Universe.

Because of the lackluster space combat, Interceptor is the first X-COM game where the micromanagement and research portion is the more satisfying of the two halves. Read the Review

X-Men Legends II: Rise of Apocalypse is the follow up to X-Men: Legends and features gameplay enhancements which include, double the superpowers and customization capabilities, the debut of several new playable characters, over 100 diverse types of enemies, and a breathtaking range of exotic and real-world environments. Read the Review

X-Blades is an anime-inspired hack-and-slash action game, featuring a heroine armed with guns, blades, and magic.

It's like an X-Files primer, filled with cute references to events from the show and following a plot that the devout will be able to predict within the first 15 minutes of the game. Read the Review

Apart from new art and a handful of new combat options, this is exactly the same game as UFO Defense, only much more difficult. Read the Review

This is a second-rate game. Read the Review

Balance of Power does an admirable job of addressing almost all the complaints gamers had with the original game. Read the Review