In the year 2023, cobalt has become an element of great strategic importance for the humans, being used in the construction of hyperatomic reactors. The last important site of the galaxy is in IO, third moon of Jupiter, where a large-scale extraction plant has been installed.

But the station has been sabotaged by a group of rebels who have placed bombs that will explode if their requests are not accessed. There is no time for requests. PETE JONES, known as COSMIC SHERIFF, the best laser sniper in the galaxy, leaves the orbital station TERRA-1. Your mission: defuse the bombs and kill the saboteurs.