XCOM: Enemy Unknown is an action strategy game developed by Firaxis Games. Play as the commander to a special paramilitary unit called XCOM. Your job is to protect earth from global alien invasion. Manage resources, advance technologies, and plan out individual units as well as global scale strategies to fend off the invading foe! Engage in over 70 unique missions, interact and negotiate with world governments, research alien devices and customize your own instruments of death! Build a base, develop it, grow your own units and participate in turn-based close combat!

XCOM: Enemy Unknown is a turn-based tactical video game, developed by Firaxis Games and published by 2K Games. The game is a "reimagined" remake of the 1994 cult classic strategy game UFO: Enemy Unknown (also known as X-COM: UFO Defense) and a reboot ...   more on Wikipedia

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