Sci-Fi

Sci-Fi themed games are games that are characteristic of science fiction literature; the narrative is dependent on the impact of scientific discoveries that do not yet exist in reality. Some games, such as those in the Half-Life series and Unreal series take place in a sci-fi universe that was created specifically for the purpose of the games. Others may take place in existing sci-fi universes, such as licensed Star Wars games. Common elements of sci-fi themed games include futuristic settings, high-tech items and weapons, and alien characters.

BioShock

Bioshock is Ken Levine's vision of a paradise lost. This first person shooter is considered the spiritual successor to the System Shock series. The game takes place in the underwater utopian city Rapture as it is in a state of impending collapse. You must survive the horrors that await.

Bioshock is a FPS developed by 2K Boston/2K Australia. It is set in a 1960 that got a big dose of science fiction.

Star Wars: Knights of the Old Republic

The game details events that occurred thousands of years before any of the Star Wars movies. A Sith Lord called Darth Malak is intent on destroying the Republic and needs a lightsaber swatting. Players can recruit several different NPCs and have active parties of three characters. Battles are a mix of turn-based and real-time actions. NPCs are a collection of humans, droids, and other assorted alien things. Party members develop based on class and player customization decisions. A lovely array of Force powers is available for your adventuring pleasure.

Night Watch

Players take control of a party of supernatural Others. The Others are split into the two factions of Light and Dark. These two factions battle each other in a secret war admist the humans of the world. The game plays out with a top-down perspective allowing players to make tactical decisions during combat. Combat is turn-based with action points determining what each character can accomplish during a combat turn. With enough practice you will be able to jump into the Gloom and sneak by the kiosk vendors at your local mall.

Turok 2: Seeds of Evil

You are the Turok Joshua Fireseed, who has been summoned to the Lost Land to defeat the alien race known as the Primogen. The collection of weapons available to Turok are arguably the best selection of weapons to ever appear in a first-person shooter. This game boasts an aiming system that allows for specific body parts to be targeted and "removed". Razor Wind = Carnage.

Team Fortress 2

Developed by Valve, Team Fortress 2 is a class-based, multiplayer FPS. Players choose teams and then compete against one another with various winning objectives such as "capture the flag". There are nine specialized classes that the player can select. Players are encouraged to work together as teams to compensate for the weaknesses of different classes. The game has a unique, cartoon style which allows you to enjoy your repeated deaths at the hands of your turncoat friends.

Warsow

Warsow is a fast paced, free, first person shooter aimed solely at competitive play. It's currently still considered "in beta" as it's being updated based on community input, play-testers. While not having quite the popularity of other FPS deathmatch games like Quake3 or UT2k4, it has quite a following in the United States and most of Europe, and just had it's first cash-prize LAN event, CDC3.

Star Wars: Battlefront II

Battlefront II is the second title in the Battlefront series from Pandemic and LucasArts. The series places the player in the middle of large-scale battles on both land and space. The game is fundamentally similar to its predecessor, albeit with the addition of new gameplay mechanics. The general objective in most missions is to eliminate the enemy faction.
Like Star Wars Battlefront, the game is split into two eras, the Galactic Civil War and the Clone Wars. Players have the ability to choose between six classes during gameplay.

Crysis

Crysis is based in a fictional future, where an alien race has invaded Earth. The single player campaign has the player assume the role of Jake Dunn. Dunn is a United States Delta Force operative, who is armed with various futuristic weapons and equipment, most notably a "Nano Muscle Suit", which is an artificial and technologically advanced exoskeleton, inspired by the United States' Future Warrior 2020 program, according to Bernd Diemer, one of Crytek's senior game designers.

Half-Life: Source

Winner of over 50 Game of the Year awards, Half-Life set new standards for action games when it was released in 1998. Half-Life: Source is a digitally remastered version of the critically acclaimed and best selling PC game, enhanced via Source technology to include physics simulation, enhanced effects, and more.

Half-Life 2: Episode Two

Half-Life 2: Episode 2 is the latest continuation of the Half-Life story from your friends at Valve. Gameplay is essentially the same as the previous two games with the emphasis on action. There are some large maps which give a nonlinear tint to parts of the game. A new ammunition is available for the gravity gun which allows placement of Strider destroying "sticky bombs".

If you got the first two you know you are getting this one so why fight it?