Time Commando is an action-adventure computer and video game developed by Adeline Software. At the Historical Tactical Center, the military, with the help of a private corporation has created a computer capable of simulating any form of combat from any point in history. However, a programmer from a rival corporation infects the system with a "Predator Virus" that creates a time-distortion vortex, which threatens to swallow the world if it is not destroyed. The player controls Stanley Opar, a S.A.V.E. operative (Special Action for Virus Elimination) at the facility who enters the vortex to try and stop the virus. In order to accomplish this, Stanley must combat various enemies throughout different time periods. These eras are Prehistoric (featuring cavemen, saber tooth tigers, and cave bears), Roman Empire, Feudal Japan, Medieval, Conquistador, Wild West, Modern Wars (World War I and supposedly World War III), Future (Stanley's era), and finally, inside the main computer (Virus World), culminating in a showdown with the virus itself.