[6][5] Legions of the Undead is an action role-playing game that takes place from a first-person perspective presented with two-dimensional digitized sprites on a three-dimensional environment, similar to other titles in the genre such as Ultima Underworld: The Stygian Abyss.
[6][4][7] The player would be tasked with entering multiple dungeons in order to find and kill an ancient evil known as Centurion Gargath, who manifested himself on the human plane and consumes the souls of those within his range.
[16][17][18][19] In two 1994 interviews by both GameFan and GamePro, Rebellion revealed more info about the project such as using an enhanced version of the game engine found in Alien vs Predator.
[9] Most of the game's development team consisted of the same staff who previously worked on both Alien vs Predator and Checkered Flag such as artists Stuart Wilson, Toby Harrison-Banfield, and Justin Rae, with Dan Mitchell and Jamie Lokier being the programmers of title.
[6][5][20][24] Despite kept being advertised and featured in magazines during 1995,[25][26][27][28] internal documents from Atari Corporation listed the project's development as terminated on December of the same year, suggesting that the game was cancelled for the Jaguar.