In Space Siege, you take on the role of Seth Walker, a combat engineer aboard the Armstrong (the lone surviving ship). Your objective is to protect the human race from being annihilated by this unknown alien species. Ultimately, you must make a horrific choice: will you sacrifice your humanity to save the human race?
At your disposal will be an arsenal of futuristic weaponry and armor, cybernetic upgrades, and a robotic partner that you can customize and command.
Space Siege will also feature a single-player campaign that takes place across the vast confines of the Armstrong, a separate mission-based multiplayer campaign, character-building gameplay elements and a storyline that asks: What does it mean to be human?
Feature List:

-Tactical Combat Action - Outsmart your enemies by setting up ambushes, dodging attacks, ducking behind cover, and using any of the multiple special abilities available to you.
-Multiple Gameplay Paths - Define your game experience with the decisions you make. Will you remain truly human in the face of insurmountable odds? Or will you enhance your abilities with cybernetic technology to even the score? Customize your character with multiple skills and special abilities that fit your style of play, but realize, all your decisions will have repercussions.
-Customizable Robotic Partner - Upgrade HR-V, your robot companion, with armor, weapons and special equipment. Command HR-V to perform offensive and defensive tactical combat maneuvers or combine your efforts and unleash special attack combos.
-Chilling Sci-Fi Story - Follow a multi-chapter storyline and make key decisions that determine the best means to deal with the ferocious alien menace. Interact with dozens of characters with their own histories and personalities - no more "generic NPCs".
-Online Multiplayer - Up to 4 players can play cooperatively in a separate multiplayer campaign designed specifically for online play. Customize enemy difficulty and toughness to best fit your skill level.
-Futuristic Combat Technology - Access high-tech weaponry and armor in addition to advanced cybernetic upgrades that will offer powerful abilities with both risks and benefits.