100 Rogues is the best "roguelike" for IP available, and provides a solid dungeon crawling experience.
Using the standard roguelike premise, you steadily make your way down into a deep dungeon, level by level, and when you eventually die, you die. Final. Done. Such is the charm of the roguelike: a sense of finality which heightens the play, knowing full well that any room might be your last. 100 Rogues does good on the sub-genre's basic tenets, but also mixes things up from time to time. For instance, you can begin the game as one of 4 archetypes, each with their own skill-tree and leveling. You'll find vendors every so often which sell random loot which might help you, though inventory slots are limited. And you'll also encounter a few bosses along the way, something rarely found in this sort of game. These changes on the standard form might raise a few eyebrows, but as they're part of the wider RPG archetype, they feel right at home. This is likely because so much else is done so well: the turn-based combat is solid, the skill-trees useful and interesting (especially skills like Finger of God, which features the occasional giant finger crushing your foes). The difficulty curve is effective, as each level deeper brings more challenging enemies yet suits the leveling system.
Unlike some roguelikes, there is a finale/ending to the game if you progress far enough, which is different from roguelikes which endlessly generate maps. Yet getting to that point will take some doing, and the process in the intervening time is well worth the trip. If you're a fan of the genre, don't hesitate to pick 100 Rogues up. If you've yet to experience the quality gameplay of a roguelike before, there's probably not a better game to introduce you.