The classic arcade game Defender is recreated in this game. Your mission is to destroy the aliens and save the people from being abducted.

Use the arrow keys to control your ship.
A key or space bar to fire - hold down for constant fire.
S key - Smart bomb that destroys everything on the screen.
D key - Hyperspace teleports you to a random spot on the map.
If you shoot an alien and one of the people is dropped from too high they will die. You have to catch them and land them safely.