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Prisoner of Ice (also Call of Cthulhu: Prisoner of Ice) is a 1995 computer game based on H. P. Lovecraft's Cthulhu Mythos, particularly At the Mountains of Madness. The game, like its predecessor Shadow of the Comet, is an adventure game.

Prisoner of Ice takes place in August 1939, one month before World War II, primarily around Antarctica. It concerns a young American officer, Lt. Ryan, who has been assigned to a British submarine, the HMS Victoria, for special missions.

As the game begins, the submarine is fleeing the Antarctic after rescuing a Norwegian who has recently escaped from a secret German base in the Antarctic (it is later revealed that the base is built atop the Ancient Ruins mentioned in At the Mountains of Madness). Along with the Norwegian, the sub has picked up two "top secret" crates, stolen from the Nazi base.

Prisoner of Ice features a very simplified version of the classic adventure game interface, where you can left click with the cursor to operate an object or right click to look at it. The program won't let you do anything with these objects, other than the few appropriate actions needed to advance the game.