The game play is simple and challenging - survive for as long as possible while at the same time getting as many points as you can.
You are stranded on one of Jupiter's moons and the native Lunar Crab population don't take kindly to you being there.
Scurrying about, they continually spit green goo at you whilst darting in and out of the rocks.
The screen is presented in 3D with sandy ground in the foreground, running away to mountains and hills in the background. You can only move left and right, scrolling through a large landscape, and firing off into the distance with your laser canon.
Each level gets harder and harder, and in a slight change to the original, I have made level 5 the end level, and changed the way in which the crabs attack/die. Each level holds 20 crabs that must be killed before you get a bonus and can move on to the next lot.
After level 5, the levels stop and the games enters into a 'progressive' phase. Each crab you kill re-appears somewhere else on the landscape, which means this level just keeps on going.
This is an old remake and may not work on newer systems. It was released in 2001.
Lunar Crabs PC