| # | Name | Author | For | Rating | Short description |
|---|
| 281 | Clarent 1.0 | GreyKnight | NetHack 3.4.3 | 90% | Adds Clarent, the *other* sword from Arthurian legend |
| 282 | Chess Moves v1.0 | Clive Crous | NetHack 3.4.3 | Not rated | See each monster move individually |
| 283 | CharGfx v1.0 | Pasi Kallinen | NetHack 3.4.3 | Not rated | Moves {IBM,DEC,MAC}graphics options into a single compound option |
| 284 | Changing Mazes v1.0 | Pasi Kallinen | NetHack 3.4.3 | 100% | Random maze levels will change slightly during game |
| 285 | Cats and Canopeners v1.0 | Nicholas Aodhagan Webb | NetHack 3.4.3 | 82% | Cats come running when you use a can opener in real life, so why not in NetHack too? |
| 286 | Candles on altars 1 | Malcolm Ryan | NetHack 3.4.3 | 70% | A lit candle dropped on an altar with burn brightly or dimly depending on your prayer status. |
| 287 | Cancelling magical traps 1.0 | Malcolm Ryan | NetHack 3.4.3 | 52% | Cancellation will disarm a magical trap |
| 288 | Cancellation v1.0 | Malcolm Ryan | NetHack 3.4.3 | Not rated | Monsters can use wands of cancellation. |
| 289 | Camera Demon v1.0 | L | NetHack 3.4.3 | 90% | Breaking an expensive camera may release the picture-painting demon inside |
| 290 | Build in /tmp on Linux | ais523 | NetHack 3.4.3 | Not rated | easily make a temporary NetHack build |
| 291 | Building V1.1 | Bobby Durrett | NetHack 3.6.0 | Not rated | Adds scroll/wand/spell of building which creates walls, doors, room, and corridor squares |
| 292 | Brewing 1.0 | Malcolm Ryan | NetHack 3.4.3 | 76% | Brewing potions using juice and molds |
| 293 | Brad's Pitt v1.0 | Clive Crous | NetHack 3.4.3 | 80% | Makes one pit in the game belong to Brad, lucky you to find it |
| 294 | Biodiversity v1.0 | Nicholas Aodhagan Webb | NetHack 3.4.2 | 76% | Lots of new monsters and other stuff. |
| 295 | Bard v0.9 | André Bertelli | NetHack 3.4.3 | 60% | Adds a new player role, the Bard. |
| 296 | Bag of Tricks Enhancement v1.3 | Nephi | NetHack 3.4.3 | 80% | Changes the behavior of the Bag of Tricks to something a little more interesting than a wand of create monster in bag form. |
| 297 | Autotakeoff v1.0 | Aardvark Joe | NetHack 3.4.3 | Not rated | adds a new option "autotakeoff" which controls whether the 'T' and 'R' commands display a prompt when there is only one accessory or piece of armor to take off. |
| 298 | Autoskills 0.1 | Mikael Lind | NetHack 3.4.3 | 70% | Automated skill management |
| 299 | autosave patch 0.1 | Vitaly Ostrosablin | NetHack 3.6.1 | Not rated | Automatic save-and-quit after N turns |
| 300 | Autofire v1.0 | Malcolm Ryan | NetHack 3.4.3 | 80% | When you attack a monster, you will fire ammo instead of hitting with your missile launcher. |