Impossible Mission is a famous puzzle-solving action adventure designed and programmed by Dennis Caswell, initially for the Commodore 64. It was released in 1984 by Epyx. The game was ported to several home computer platforms, including Amstrad CPC, Apple II, BBC Micro, ZX Spectrum, and several consoles.
The player is a secret agent, and he has 6 hours to complete the game and beat evil Professor Elvin Atombender. To do that, he has to find all the pieces of the password and access Atombender's control room, avoiding the robots. Each time the player dies, 10 minutes are lost, and 2 minutes are consumed when the portable computer is used.
The game is also known because the Commodore64 version features an early use of digitized speech.
In 1985 readers of the Zzap!64 magazine voted Impossible Mission the best Commodore 64 game of the year.