NetHack
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Parent game
The object of the game is to delve into a dungeon to retrieve the Amulet of Yendor, and perish with as much game points as possible. The player can start out with a different ability set, such as Wizard or Cave(wo)man. The player confronts various monsters: hobgoblins, leprechauns, acid blobs, bats, centaurs, chameleons, dragons, ghosts, imps, trolls, and has weapons, armor, potions, wands, rings and special items to aid in this, e.g. related to fire there is a scroll, a ring, a monster and a wand, and their interplay is to be discovered. There is time pressure because you die if your food runs out, food is scattered around the dungeon. There is a limit to what you can carry, forcing you to leave valuable items behind. The gold and gems you carry when you die increases your score, but it is heavy too. The player must enter Hell to recover the Amulet. Entering Hell for the uninitiated just means that "you burn to a crisp". (In NetHack, Hell is renamed.) The player encounters special rooms such as shops, crypts, and vaults. Other spatial elements in the game are traps and swamps. As your experience grows, so are your abilities, score and the need for food. Retrieving the Amulet doesn't guarantee you the high score. After all the Amulet is just a very valuable gem.
Forks
SLASH'EM (Super Lotsa Added Stuff Hack - Extended Magic) is a variant of NetHack based on version 3.4.3.
An open-source NetHack variant and remaster developed by Sound Mind Games, a non-profit association based in Finland. It is playable on Android, iOS, and Windows.
xNetHack is a fork of the dungeon exploration game NetHack. It is a distant descendent of Rogue and Hack, and a direct descendant of the development version of NetHack 3.7. The main goals of xNetHack are to take vanilla NetHack and: 1. Fix gameplay balance issues. 2. Remove tedious and frustrating parts of the game. 3. Make uninteresting parts of the game more interesting. 4. Experiment with new ideas from the community.
dNetHack is a NetHack variant based on NetHack 3.4.3. The name stands for Dungeons and Extra-Terrestrials Hack (DnET-Hack).
EvilHack is a variant initially based on NetHack 3.6.2, created by Keith Simpson.
UnNetHack is a variant of NetHack initially based off NetHack 3.4.3, and is maintained by Patric Mueller and others
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