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3rd person adventure game with a Sci-Fi protagonist. Very story driven with an emphasis on cinematics.

A top-down third-person shooter. You are stationed on one of Jupiter's moons which was recently colonized, and are called in to investigate the cause of a power outage. Aliens threaten to overwhelm a nearby colony. Only you stand in their way.

Rise of Nations: Rise of Legends is a real-time strategy game for the PC made by Big Huge Games, and published by Microsoft. It is a spin off of the popular game Rise of Nations, released in May 2003. However, rather than being a historical game, it is based in a fantasy world, where technology and magic coexist. It was released on May 9, 2006 in North America and on various dates around May 26, 2006 in the rest of the world.

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.

Deus Ex is an FPS/RPG hybrid from Ion Storm and Eidos Interactive. It is most notable for its free-form skill-based gameplay, which allows nearly unlimited solutions to missions, often allows for multiple outcomes, and lets you shape your character to be best suited for your style of play by allowing you to develop the skills of your choice.

Half-Life is the groundbreaking FPS that follows the "everyman" hero Gordon Freeman. This is the first installment of the ongoing series, which ties together aliens and government conspiracies. Really, this game doesn't need any introduction...

The Chronicles of Riddick: Escape from Butcher Bay is an FPS from Starbreeze Studios and Vivendi Universal. The plot serves as a prequel to the 2000 film Pitch Black, and features Vin Diesel's voice and likeness.

Black & White 2 is a strategy game from Lionhead and EA. Like the original, you play as a benevolent or malevolent god, though there's less godly competition this time around. You build cities, conquer lands, and generally make your presence felt using whatever divine methods you like.

Set in post-WWII New York City, The Godfather: The Game follows the player-created character's rise through a crime syndicate based on the book and film franchises. Combining events from the movie with side-story missions, the player must earn respect by completing missions in territories controlled by New York's five crime families.

Join the High Altitude Warfare eXperimental squadron for missions full of dogfights and bomb drops in this arcade combat flight sim. Tom Clancy's HAWX also features multiplayer coop and versus modes and is packed with top-notch gaming technology : accurate satellite-generated maps, voice commands, DX10/10.1, native support for TripleHead and TrackIR, full amBX...