Impossible Mission is a platform Commodore 64 computer game that was programmed by Dennis Caswell and published by Epyx in 1984:
Here’s a brief description of the game play:
Impossible Mission has the user play a secret agent who must 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.
Stay awhile… stay forever! That will forever be burned into the brains of anyone who grew up with the Commodore 64 computer and liked to play games.