Halo: Spartan Assault brings the excitement of Halo combat to Steam for the very first time. Battle your way through 30 action-packed missions against the Covenant as you explore the origin of the Spartan Ops program featured in Halo 4. *DirectX feature level 10 required. *

Livelock is a co-operative top-down shooter where you play solo or with up to two allies to break the cycle of infinite war between machines. As one of the remaining Capital Intellects, your role is to unlock Eden and revive humanity.

Experience the final explosive chapter in the Alien Breed series and uncover the horrifying truth surrounding the existence of the Breed. Launch discount good thru Nov. 24 10am PST.

Can you survive the alien onslaught? Gamers across the world will now have a chance to play the next chapter in this high-budget, high-quality series.

Tower 57 is a fast-paced neo-retro shooter where cooperation is as important as your ammo capacity. As a member of an extraordinary task force fight your way through a dieselpunk megatower and uncover its hidden secrets.

Surviving is only half the game. The award-winning atmosphere and gameplay mechanics of the original Shadowgrounds make a triumphant return in this spin off/sequel armed with a slick new feature set! Shadowgrounds Survivor tells the story of the last remaining humans on Jupiter's moon Ganymede, where the alien onslaught is in full force.

Shadowgrounds breathes fresh air into the action genre with explosive combat sequences, an innovative weapon upgrade system, and an intriguing storyline. The adrenaline-pumping, top-down gameplay and audiovisual fireworks set the scene for this new action experience which also includes single computer (split keyboard or joystick) co-op...

Experience the explosive science fiction arcade-shooter that resurrects a much revered franchise in an epic single player and co-op multiplayer campaign.

Death Goat is a bloody arcade shooter featuring hordes of brutal enemies & eardrum destroying Heavy Metal.

Bombshell is an Action Shooter game in which bomb disposal technician turned mercenary for hire, Shelly "Bombshell" Harrison must strong-arm her way across 4 planets in a galactic adventure to rescue the president (and humanity) from an apocalyptic alien threat.

In this 2-player twin-stick shooter, use a friendly drone for a game-changing abilities. Survive waves, upgrade, and uncover the mystery in this cooperative, action-packed experience.

JASEM is insanely hard and ridiculously unforgiving low-poly twin-stick arcade blastathon set to an electronic beat and filled with bright explosions and neon effects.