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NetHack is one of the most well-known open-source roguelike games.
- 1 Debug Mode
- 2 Unused Attributes
- 3 Unused Monsters
- 4 Unused Spells
- 5 Unused Symbols
- 6 Monster Frequency
- 7 Version Differences
To enter "wizard mode", the user must boot the game with the -D -u wizard command line parameters. Doing this will enable a host of changes to the game:
- Wishing has far fewer limits, letting you wish for all traps (except for holes or trapdoors on levels with an undiggable floor), certain dungeon features like fountains or thrones, artefacts, unique items, items with an exact number of charges or +'s, altars with specific alignments...
- If you enter a level that has bones files present, the game will ask if you want them to be loaded or not.
- The #pray comment lets you "force the gods to be pleased". If you choose not to do so, the usual prayer timeout rules still apply.
- Applying a scroll of genocide to "*" will remove every monster on the level without actually genociding any species. Be warned that this will also affect peaceful and tame monsters, like your dog or the Quest Leader.
- Approaching your guild leader with a high enough experience level but an insufficient alignment record will give you the option to set your alignment level to 20.
- Dying will pop up a "Die? (y/n)". Choosing no will, naturally result in you returning to life. Choosing to die on bones-eligible levels will pop up a "Save bones? (y/n)" prompt as well.
Additional Environment Variables
|WIZKIT||Set to a filename containing a list of item names (up to 128 lines) to wish these items into your inventory at the start of the game.|
|SHOPTYPE||Set to a letter code (see below) to force a specific special room to generate on every floor, even if doing so would break room creation rules.|
|SPLEVTYPE||Force the use of specific layouts for the Special Levels that use specific pre-made layouts. For example, |
|NH_HEAPLOG||If the MONITOR_HEAP compile-time option is enabled (it's not by default), setting this to a filename will cause Nethack to log all memory allocation and release information there.|
|SHOPTYPE values and their meanings|
|z or Z||Treasure zoo|
|m or M||Graveyard|
|b or B||Beehive|
|t or T or \||Throne Room|
|s or S||Barracks|
|a or A||Anthole|
|c or C||Cockatrice Nest|
|l or L||Leprechaun Hall|
|g or G||General store|
|Any object symbol||A Shop selling those objects.|
Additional Config Options
|monpolycontrol||When set to true, whenever a monster changes shape you'll be promped to specify their new form.|
|sanity_check||When set to true, runs more sanity checks on monsters, objects and the map prior to each turn.|
|travel_debug||When set to true, shows the pathfinding progression for the travel command.|
|wizweight||When set to true, object descriptions include their weight.|
|Ctrl + E||Reveal Secret Doors and Traps|
|Ctrl + F||Map the current area|
|Ctrl + G||Create a monster within an area|
|Ctrl + I||Show identities of items in pack|
|Ctrl + O||Show notable dungeon features|
|Ctrl + T||Teleport within the current area|
|Ctrl + V||Teleport between areas|
|Ctrl + W||Make a wish|
|Ctrl + X||Show all attributes|
|#levelchange||Changes your experience level.|
|#lightsources||Show mobile light sources|
|#panic||Prompts to test the "panic" mechanism. Replying in the affirmative will result in the game terminating with the message "Oops... Suddenly, the dungeon collapses."|
|#seenv||Shows seen vectors.|
|#stats||Shows memory usage statistics.|
|#timeout||Look at the timeout queue.|
|#vanquished||View counts of killed monsters, sorted in a variety of ways.|
|#vision||Shows vision array.|
|#wizbury||Buries all adjacent objects.|
|#wizdetect||Search for hidden things within a modest radius. Same as CTRL+E.|
|#wizgenesis||Create a monster. Same as CTRL+G.|
|#wizidentify||Identify the items in your inventory. Same as CTRL+I.|
|#wizintrinsic||Give yourself any intrinsic for 30 turns.|
|#wizlevelport||Teleport to another level. Same as CTRL+V.|
|#wizmap||Map out the level. Same as CTRL+F.|
|#wizrumorcheck||Validates the first and last rumor for the true and false sets.|
|#wizsmell||Smell a monster.|
|#wizwhere||Show the locations of secret levels.|
|#wizwish||Wish something into existence. Same as CTRL+W.|
|#wmode||Show wall modes.|
The player is noted to have Intrinsic Night Vision in you.h, but this never seems to contribute to the game ultimately.
There are shimmering dragons mentioned in the code. This would have left behind shimmering dragon scales, used to make shimmering dragon scale mail.
The beholders are also mentioned and have a few gaze attacks.
Vampire mages and vorpal jabberwocks are tougher variations of existing in-game monsters.
Two deferred spells are mentioned in the code: "flame sphere" and "freeze sphere".
The symbols 6, 7, 8, and 9 aren't used to represent anything by default.
In vanilla NetHack, monster frequency is rated on a scale of 0–5, where 0 isn't randomly generated and 5 is common. However, it could potentially go as high as 7.
- A tiled graphic mode would be available starting with NetHack 3.2.0, along with the standard text-mode variation(s).
- Barbarians were known as Fighters until 2.2a.
- Ninjas were superseded by Rogues in Version 3.0.
- Elfs were superseded by Rangers in Version 3.3.
- Similarly, Earendil and Elwing were quest leaders for male and female elves respectively. They were replaced with Orion in Version 3.3.
- Also, the Goblin King is replaced with Scorpius.
- Medusas were represented with a 8, but later came to be represented with a green @.
- Giants were represented with a 9, but later came to be represented with an H.
- Trappers were represented with a , (comma), but later came to be represented with a t.
- Only in version 2.3e can the player encounter the Three Stooges as enemies.
- Osquips and Mad Scientists were in the game from Version 3.0 to Version 3.0.6.
- There were unarmored soldiers and watchmen introduced in Versions 3.0.0 and 3.1.0, but both were removed in 3.1.3.
- NetHack 3.0.0 introduced the Thunderfist, an artifact lucern hammer. It was swiftly replaced with the Mjollnir.
- NetHack used to have slices of pizza as items until Version 2.3e.
- Version 2.3e is the only version to have a badge as an item.
- Originally, the player had to go to Hell to finish the game. However, starting with Version 3.1.0, Hell would be replaced with Gehennom.
- Version 3.2.0 included an obituary for then-recently deceased development team member Izchak Miller. This is still available in the code and can be enabled with the "NH320_DEDICATION" compile-time option.
- In versions 3.1.0 to 3.3.1, the Yeenoghu had the touch of death due to a bug, which was the result of adding the riders carelessly after the code that handles the confusion attack. This was fixed simply by adding a break when appropriate.
- Version 3.4.3 treated any command as a waster of time if the player was walking on lava.