Blue Shift: This game may remind you of those old arcade games you use to play back in the days. In this addicting game you have to basically shoot your enemies and try to survive until you clear that level. This game has simple straight forward game play, which is to shoot and avoid being shot at. This game is simple yet it’s amazingly addictive!Note: Key can be remapped in the options menu which can be accessed through the pause menu Instruction (how to game, Blue Shift walkthrough): Fire Weapon= A key Shield= S key Change Weapon= D key Pause= P key. Blue Shift is under categories.