Desktop Dungeons!

NetHack is a single player dungeon exploration game that runs on a wide variety of computer systems, with a variety of graphical and text interfaces all using the same game engine. Unlike many other Dungeons & Dragons-inspired games, the emphasis in NetHack is on discovering the detail of the dungeon and not simply killing everything in sight - in fact, killing everything in sight is a good way to die quickly. Each game presents a different landscape - the random number generator provides an essentially unlimited number of variations of the dungeon and its denizens to be discovered by the player in one of a number of characters: you can pick your race, your role, and your gender. »

Cataclysm: Dark Days Ahead is a roguelike set in a post-apocalyptic world. Surviving is difficult: you have been thrown, ill-equipped, into a landscape now riddled with monstrosities of which flesh eating zombies are neither the strangest nor the deadliest.

Dungeon Crawl Stone Soup is an open-source, single-player, role-playing roguelike game of exploration and treasure-hunting in dungeons filled with dangerous and unfriendly monsters in a quest to rescue the mystifyingly fabulous Orb of Zot.

Brogue is a Roguelike game for Mac OS X, Windows and Linux by Brian Walker.

Dungeon of the Endless is a Rogue-Like Dungeon-Defense game, in which the player and their team of heroes must protect the generator of their crashed ship while exploring an ever-expanding dungeon, all while facing waves of monsters and special events as they try to find their way out...

Ancient Domains of Mystery (ADOM for short) is a roguelike game which means that it is a single-user game featuring the exploration of a dungeon complex (and in the case of ADOM a few other games of this genre: the exploration of a large wilderness area with villages and many special locations). You control a fictional character described by race, class, attributes, skills, and equipment. This fictional character is trying to achieve a specific goal (see below) and succeed in a difficult quest. To fulfill the quest, you have to explore previously undiscovered tunnels and dungeons, fight hideous monsters, uncover long forgotten secrets, and find treasures of all kind. »

Hack, Slash, Loot is a single-player turn-based dungeon crawler. Take control of a lone hero and explore sprawling dungeons, fight dangerous monsters, and most importantly, plunder valuable treasures. With a new dungeon created every game you can be sure that no two playthroughs will ever be the same. Boasting easy to master controls you'll be adventuring in no time, but there is still enough depth to challenge the most hardened of adventurers.

Descend into the depths of the dungeon until you reach the foul daemon known as "He who the author cannot spell consistently", or, Baezl'bub. When you have slain Baezl'bub in heroic combat, or, if Baezl'bub dies in any way, retrieve his black heart and bring it to the surface world.

The Dungeons of Dredmor await. Are you ready for them?

100 Rogues is a dungeon crawling fantasy adventure available on iOS for iPhone, iPod Touch and iPad. It features vivid pixel art, charming characters, and is a quick, pick-up-and-play challenge.

Pathos is a roguelike adventure game based on the rule set from Nethack. Choose from 13 classes and journey deep into the dungeon. Descend to hell to defeat your nemesis before escaping the dungeon with all the loot you can carry!

Shattered Pixel Dungeon is a Roguelike RPG, with pixel art graphics and lots of variety and replayability. Every game is unique, with four different playable characters, randomized levels and enemies, and over 150 items to collect and use. The game is simple to get into, but has lots of depth. Strategy is required if you want to win!

Quest of Dungeons is a turn based dungeon crawler game, a roguelike.An evil Dark Lord has stolen all the light, so your mission is to enter his lair and defeat him. The dungeons layout is procedural so you won't find items/enemies in the same place each time you play.