GAME INFO:
(copied from back of Sega Master System cover)
Agent 4125... Half the threat of world annihilation posed by Elvin Atombender from his underground laboratory. Penetrate his stronghold an dodge or deactivate the guard robots whilst unscrambling the secret code that will allow entry to the control center. The world awaits in FEAR. Your mission is stamped 'IMPOSSIBLE'

THE GAMEPLAY:
It's a very difficult game. Each of it's thirty-two rooms are unique(only two rooms are the same), and each one has many pieces of furniture which need to be searched to get pieces of code, in which must be put together to divine the password and open the control centre doors.
The robots, of which there are many in each room, all act differently, some attacking on sight, and some are speeding back and forth, waiting for you to mistime your jump over them and kill you.
Other things include lifts which are essential to getting all the items in a room, and computer terminals which allow you to reset the lifts or freeze the robots(this is temporary) in a room.

INTERESTING TRIVIA:
The main player sprite for the C=64 version is an unused sprite for Summer Games.
It is being remade for the Nintendo DS, and is rumoured to be coming to the Nintendo Wii's Virtual Console in the near future.