Invaders by Josip Retro Bits is a simple BASIC game made for Commodore 64.
The invasion on the planet has begun and with your ship, you will find yourself on the front line facing the enemies. It is important to kill as many enemies as you can and help your comrades behind you. Moving enemies is done by calling a kernel routine. This routine moves down all lines below an injected line. With a little hack, it is possible to use this and produce a constant scrolling-down effect. Press key ‘1’ to change the moving direction to the left, and key ‘9’ to change the moving direction to the right. Press key ‘8’ to shoot. Kill as many enemies until you run out of time.