Impossible Mission

Impossible Mission is a 1985 Platformer video game by Epyx, for PC, Atari 7800, and Sega Master System. Impossible Mission is the first game in the Impossible Mission series, and was followed by Impossible Mission II in 1988.

Plot
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.

Gameplay
You have a time limit in which to collect a password which will give access to the enemies control room. Letters of the password are collected by flipping collected images so they fit together. Four images will make a solid block. The images were collected by taking one of many elevators to a room, where you would search objects while avoiding the robots that patrolled platforms. You can ask for outside help at a terminal in some rooms, which will allow you (for example) to reset all lifts in the room, or temporarily disable the robots. Outside rooms, in the elevator, you can call for help with orienting the images properly. These actions cost time.