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

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