Advanced Dungeons & Dragons: DeathKeepreleased in 1995
Deathkeep is a 1st person perspective single-player "shooter" game with a touch of medieval AD&D gameplay in a full 3D environment.
Gameplay consists mostly of adventuring and flattening every living and non-living creature in your way. Destroying monsters allows the character to level-up and become more powerful as well as gain new spells. The dungeons are filled with traps, streams, caverns, ledges, and every possible obstacle to cause the player to lose their way in this maze of mazes.