Instructions for Alien Invaders
- Left Arrow Key: Move Ship Left
- Right Arrow Key: Move Ship Right
- Space Bar Key: Fire Weapon
- ESC Key: Exit Game
- Enter Key: Start New Game
The green and gold circles marked with a 'P' are Power Ups. Each one makes your ship fire at a faster rate.
Space Alien Invaders is a freeware arcade style space shooter game you can play online, or download for the PC and Mac.