Rows of aliens are marching around at the top of the screen and you must shoot them all before they destory you.

One game varation is "Swooping", which is similar to the arcade game "Galaxian." The aliens move back and forth at the top and occasionally swoop down towards you.

The other variation is "Marching," similar to "Space Invaders." The aliens march back and forth and, when they reach the side, move down towards you as a group. If they reach the bottom, the game is over immediately.

This game is designed for the Agenda VR3 Linux-based PDA. However, it's written in plain Xlib, so it should run on any Unix variant. (The graphics are just sideways)

License: free