Catacombs is a cancelled FPS that was being developed by Cavia for Square-Enix in 2010. The game was never officially announced and the project was shelved in 2011, but in 2012 Siliconera leaked some screenshots and informations about it.
Catacombs was basically an interesting crossover between a RPG with random-generated dungeons and a team-based shooter. The player could upgrade the guns that he found in the ruins but also use magic. Four different characters were available, each one with its own story, which according to the narrative director Brandon Sheffield had an important role in the game:
Since we’re all inherently different and our mind is the only thing we can truly know, then our reality exists only inside of our brains. So each stage was about these people destroying their own fears and doubts and also their identity. They were supposed to be overcoming their sense of self, and how that related to their identity as an American, but also their otherness.”
EDGE in 2012 played an early build of the game that ran on a heavily modifed version of Mindjack engine.
For more informations check Siliconera article and EDGE special feature.