Defeat the waves of enemy soldiers that are trying to kill you! In this game, you are an alien that crash landed on earth. Enemy soldiers from earth are trying to attack you and bring you in. You must protect your wall at all costs so they can't get to you! Use your mouse to aim and left click to shoot your enemies. Headshots will kill them the fastest. Collect loot to combine and make upgrades for weapons. Spend the money you make in each level to fix and upgrade your wall and weapons. You will gain XP as you kill enemies, which will level you up. You can learn new skills to help you fend off all of the enemies. Good luck!