Developer: Softdisk
Release Date: 1992
Source Code Release Date: June 9, 2014

As mentioned previously, Catacomb 3-D was done by what would go on to be id Software for game publisher Softdisk. What might be less obvious today is that Softdisk published games via mail via a subscription. Think of it as a literal magazine on a diskette. Consequently they needed to crank out multiple games to keep subscriptions going.

As a result, when id Software breaks out to make their own games, Softdisk decides to continue with the series and crank out a trilogy of sequels commonly referred to as the Catacomb Adventure series, the first of which is Catacomb Abyss.

In the game you play as the same protagonist from the first game, hired by the townspeople to descend into the catacombs again and defeat evil minions. Really, it's just more of the first game, though with some more varied environments.

  Buy Catacomb Abyss on GOG.com