Static Aspect

Descent 1&2 are DOS-era shooters from Parallax Software and Interplay, where you pilot an experimental fighter through a series of maze-like mines, fighting maverick robots and rescuing hostages.

MDK2 is a shooter from Bioware and Interplay, and the sequel to the classic shooter MDK from 1997. Kurt Hectic, a futuristic commando with a stealth suit and sniper helmet, returns to do battle with malevolent aliens once again. New to the series are playable characters Max, a six-legged dog who can wield four weapons and fly with a jetpack, and Dr. Hawkins, a mad scientist who must gather pieces of junk and combine them MacGuyver-style to create weapons.

Serious Sam is an FPS from Croteam and Gathering of Developers. You play as Sam "Serious" Stone, and do battle with thousands of alien nasties throughout various historical set-pieces, using an array of diverse and enormous weapons.

Another World (UK, Australia) / Out of This World (Rest of the world) is a DOS-era shooter from Delphine Software and Interplay. You play as Lester Chaykin, a physics professor, stranded in an alien universe after an experiment goes haywire. This re-release, which uses the game's European title of Another World, is fully WinXP compatible, has support for high resolutions, and has all-new artwork designed to take advantage of the high resolutions that can be turned off if desired.

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.

Serious Sam: The Second Encounter is an FPS from Croteam and Gathering of Developers. You play as Sam "Serious" Stone, and do battle with thousands of alien nasties throughout various historical set-pieces, using an array of diverse and enormous weapons.

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.