PC (Microsoft Windows)April 17, 1998
Released ✓ 
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Cyberdreams
Cyberdreams is a 1998 megawad by Gonzalo Pérez de la Ossa and Albert Valls. It is well known for featuring puzzles involving cyberdemons in each level, which the player is forced to solve without the use of weapons.
ActionShooter
Game modes
Single player
Player perspectives
First person