Sorry....er....I guess it is called UMoria. The "official" icon and title screen for the game just call it "MORIA". It's the graphical port or a public domain Rogue type game for the Amiga. It is quite a famous game, and has been available for the Amiga since the 1980s (on Aminet, etc.).
I just really miss this game, since discovering the strange bug on updated Amiga systems. I have tried doing clean installs, downloading the archive fresh from Aminet, I've softkicked into WB1.3, I've turned off caches, I've turned off extra RAM, I've turned off the 68040 and booted with the 68000. No luck.
If you want to test it for the bug, just create a Human Mage character. A Mage SHOULD start out with a few Mana points, but for some reason it doesn't, and can never get any more.