Your mission in this free online game is to take charge of your helicopter, build turrets, and do whatever it takes to protect your base and destroy the enemy. Don't let the enemy destroy your defenses and win a victory. Pick up first aid kits to restore the energy. Puck up weapon upgrades to improve your armament. Use WASD KEYS to move. Use YOUR MOUSE to aim and shoot. Press the SPACEBAR to build and repair turrets. Good luck!