In the beginning of the game you will only be able to select one mission, but as you progress you'll unlock new levels and weapons. The object of the game is to keep your player alive and complete various missions in each level. To move your player use the arrow keys, to shoot click the left mouse button, and to aim move your mouse in the direction you would like to aim. You can buy new weapons at various stages throughout each mission by stepping inside of the shop icon located throughout the levels. The more enemies you kill, the more money you have for upgrades in the shop. Your opponents will vary depending on which mission you are completing at the time. As you progress into the later missions your enemies will become increasingly large and more difficult to kill. The only way to keep up with them is to continuously upgrade your weapons selection and master the art of aiming and shooting in Robokill 2. As you are engaging hostile lifeforms throughout each mission, you will notice that each one behaves in a different way. If you want to stay alive you will need to recognize your opponent's weaknesses. You will also need to keep your player from becoming trapped by some of the more fast moving creatures. Aiming and moving are paramount to your survival in this game.