Download v1.0 for OS X or Windows. Linux is untested; please let me know how it works for you. The original 7DRL versions for OS X and Windows are also available.
For years, the Yendori people were a legend. Explorers have recently found a cave in the purported Yendori borders whose bottom is filled with water: Already divers are bringing back relics that scientists have dated to when the Yendori may have lived. You've just arrived at the impromptu dive lodge assembled near the cave waters. Will you make your riches from the cave? Or will you join the Yendori people in the Anoxic Depths?
All rotations are relative to your current heading, and OSX-players may need to hold the Fn key when viewing the help information. Controls on a QWERTY Layout:
I developed Anoxic Depths on OS X 10.10 in Unity 4.6. It uses sound effects by akemov and chipfork.
Dewaldo mentioned Anoxic Depths in his 7DRL 2015 Update. I've also implemented a commercial version, Anoxic Depths: Caves of the Yendori.