Impossible Mission

Impossible Mission is a video game by Epyx for several home computers. The BBC Micro version was written by Peter Johnson and released by US Gold.

You play a secret agent on a quest to stop the evil Professor Elvin Atombender, who is believed to be tampering with national security computers. You must penetrate Atombender's stronghold, avoid his deadly robot creations, and acquire various pieces of a password to use in the main control room. You have 6 hours to complete the game; 10 minutes are lost each time you die, and 2 minutes are expended if you use the help function on your portable computer.

The robots, rooms, and puzzle pieces will be switched around when starting over, which provides replay value.