Countdown is an adventure game released in 1990 by Access Software. The game was released for PC (DOS).

The player takes on the role of a CIA agent, Mason Powers, who wakes up in an unfamiliar place, which is, as it quickly turns out, a cold cell. The hero does not remember who he is or how he ended up in this gloomy place. The only source of information for him is a plate with a health card on his bed. From her, he also learns that a lobotomy is planned, and the patient is to be ... him. Due to a rather unfavorable situation for him, our hero quickly decides to run away from this place. By solving puzzles, the player helps Mason to locate the so-called a mole that has firmly established itself in the CIA. Our protagonist must also save the world so that it does not plunge into an armed conflict on a global scale.