Impossible Mission is a video game for several home computers. The original version for the Commodore 64 was programmed by Dennis Caswell and published by Epyx in 1984. The game features a variety of gameplay mechanics from platform and adventure games and boasted novel features for the time, such as digitized speech. Impossible Mission, which casts the player in the role of a secret agent infiltrating an enemy stronghold, is widely considered one of the best games for several platforms and inspired sequels and remakes.