Natural Selection 2 is a strategy shooter game developed by Unknown Worlds Entertainment. The war between humankind and aliens is an eternal one, immerse in one variation of it by playing Natural Selection 2! Shoot and strategize better than your enemy, play either as human militant, or as an alien predator and turn the tides of battle to ensure your kinds survival! Issue orders, place structures, collect resources and advance in your abilities with technological enhancements as a human soldier or spread infestation, lay new alien spawning hives and change your form by mutation as an alien creature. Enrol into a constantly changing environment. Ultimate Survival 2 is constantly being updated, and all the game codes are open source which makes the game constantly grow, evolve, and change to meet the public desires!

Natural Selection 2 (NS2) is a multi-player, team oriented video game which combines first-person shooter and real-time strategy rules. It is set in a science fiction universe in which a human team fights an alien team for control of resources and te ...   more on Wikipedia

Serious Sam 3: BFE is an action shooter developed by Croteam. If you want action and some action on top of that action and then more action to follow, Serious Sam 3 will do you justice. The legions of alien beasts, monsters, and mercenaries are invading earth, and it seems to be the final showdown that’ll decide who’ll handle the Earth In the upcoming future. Stand your ground and hold down your trigger, the swarms of beings are rushing in and it’s up to you to stop them all! Forget cover, strategical positioning, and retreat, Serious Sam is too serious for that king of nonsense.

Serious Sam 3: BFE is a first-person shooter video game developed by Croteam and published by Devolver Digital. It is part of the Serious Sam series and a prequel to The First Encounter. The game's story takes place in the 22nd century, during Mental ...   more on Wikipedia

System Shock 2 Steam Key GLOBAL is a game released on 2000-08-11. Published by Nightdive Studios.

System Shock 2 is a first-person shooter action role-playing survival horror video game for Microsoft Windows, Apple OS X and Linux. The title was designed by Ken Levine and co-developed by Irrational Games and Looking Glass Studios. Originally inten ...   more on Wikipedia

Sanctum 2 is a unique hybrid between FPS and Tower Defense developed by Coffee Stain. Master four different classes, each with a unique skillset as you make your way through the campaign or play with others in a up to 4 player co-op mode! Build defense towers when it is time for that, then switch to blasting your opponents in fast-action FPS.

Sanctum 2 is a first-person shooter tower defense video game, developed by independent developer Coffee Stain Studios for Microsoft Windows, OS X, Linux, PlayStation 3 and Xbox 360. The successor to Sanctum, Sanctum 2 was announced in 2012 and releas ...   more on Wikipedia

Time for a trip down memory lane with Quake II, a first-person shooter that was a groundbreaking creation by id Software at its time! Shed tears of nostalgia as you battle for survival against a vicious race of aliens!

Quake II is a first-person shooter video game developed by id Software and published by Activision. It is not a direct sequel to Quake; id decided to revert to an existing trademark when they were unable to agree on a new name that did not violate an ...   more on Wikipedia