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"This is an undistinguished Doom clone made with Pie 3D Game Creation System. Try to escape from prison against similar grey-dressed guards using weapons like guns, machine guns, bombs and lasers. Find keys to open some doors or bomb them if you can't."
--3D Shooter Legends
Eternal Prison is a game created using the 3D Game Creation System in 1995 by Laser Point and Zerbo Software. It got a one star rating on GCS Games.