Gloom 3 (also known as Ultimate Gloom and Gloom 3 : Zombie Edition) is a 1997 game for the Amiga computer. Gloom 3 was the third proper, commercially released clone of the immensely popular first person shooter Doom in the Gloom series on the Amiga.

Gloom 3's author, Gareth Murfin, was proprietor of Alpha Software, with additional graphics made by James Caygill and Jason Jordache

The game was one of two games produced by Alpha Software for the Amiga, the other being Zombie Massacre, at a time when the machine was being squeezed out of the market. Although the game was critically well received by publications such as CU Amiga, at the time of release games for the Amiga were on the decline and not deemed commercially viable, and the game received criticism for its appearance.

Gloom 3 created by