Impossible Mission is a platform computer game for several home computers, which has the user play a secret agent attempting to stop an evil genius. Professor Elvin Atombender is believed to be tampering with national security computers. The player must penetrate Atombender's stronghold, racing against the clock to search the installation for pieces which form a password, all the while avoiding his deadly robots. Once in possession of all the password pieces, the player must correctly assemble the password pieces together and use the completed password in the main control room door - where the evil professor is hiding.
The original version for the Commodore 64 was programmed by Dennis Caswell and published by Epyx in 1984.