Defend your planet from alien invaders by blowing them to bits.
Don’t let any ships get past you or it’s game over!


W and S move up and down, press E to fire.


Created by Jim South, with special thanks to John Earnest.

Contact Jim South (jim -at- with any questions or comments about the game.

SPACE DEFENSE! was made using Octo, a CHIP-8 emulator designed by John Earnest.

If you liked my game, please consider donating to or participating in Extra Life. It is a 24-hour gaming marathon to raise money for Children’s Miracle Network hospitals.
Go to for more information. Thank you.