Z Angband

Z Angband is short for Zelazny Angband, and is a variant of the roguelike Angband, pulling inspiration from the fantasy novels of Roger Zelazny, in addition to Angband's The Lord of the Rings theme.

It builds enormously upon Angband, adding about 30 more playable species, and setting the game's overworld in a huge, interactive wilderness.

Unlike most roguelikes, Z Angband (and most of the other *bands) does little to reduce Level Grinding. There is nothing to stop you sitting around on the first dungeon level and whacking at a self-replicating worm mass until you reach experience level 50, except that it'd take you about a million years. It admits in the documentation that maxing your stats is pretty much the objective of the game (although it does have a real objective; to slay a dragon). In other words, Z Angband is a game for the player who likes to level grind.

Also unlike other roguelikes, levels are not persistent; once you leave a dungeon level, you will never find that same dungeon level again (and anything you left there is gone forever).

Tropes used in Z Angband include:

Dungeon Bypass: not only can you bypass dungeons by simply going to the nearest staircase (if you can find it), you can keep going up and down the stairs until you find a dungeon you like. Each dungeon is completely randomly generated, so going up and down the stairs is the same as generating a new level. This also means that you can escape any enemy instantly, just by going up or down some stairs. They'll be gone when you return.
Explosive Breeder: an enemy kind unique to *bands, mainly because the non-persistent levels prevents them from being much trouble. Worm masses and mice will keep replicating themselves until they're a swarm filling a huge chunk of the level, and allowing you to grind.
- Or they can cause a Death of a Thousand Cuts. Sometimes when you attempt to grind.
Invisible Monsters: some just are, like ghosts, which is why it's always handy to have some way to see invisible.
I Sense a Disturbance In The Force: the player character gets 'level feelings' sometimes, normally a sense of safety or fear which indicates how dangerous the level may be.
Loads and Loads of Races: 30 in total: Amberite, Barbarian, Beastman, Cyclops, Dark-Elf, Draconian, Dwarf, Elf, Ghoul, Gnome, Golem, Half-Elf, Half-Giant, Half-Orc, Half-Ogre, Half-Titan, Half-Troll, High-Elf, Hobbit, Human, Imp, Klackon, Kobold, Mindflayer, Nibelung, Skeleton, Sprite, Vampire, Yeek, Zombie.
Spell Book: the source of magic spells for spellcasters (which is actually most of the classes in the game, although only mages really specialise in it). Although you have to 'learn' spells, you still need the book to cast them.