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

[citation needed] The game was released as freeware in 2013.

[3][4] Following the source code for the Gloom engine being released in 2017,[5] a compatible source port for modern systems was created in 2020 called ZGloom.

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