| # | Name | Author | For | Rating | Short description |
|---|
| 261 | Rusting iron bars v1.0 | Malcolm Ryan | NetHack 3.4.3 | 80% | Rust monsters can eat through iron bars |
| 262 | Scroll of enchantment v1 | L | NetHack 3.4.3 | 60% | Two scrolls combined into a single flexible item |
| 263 | Scroll of Flood v4 | Crystal | NetHack 3.3.1 | 72% | Adds a new item, scroll of flood |
| 264 | Scroll of leet hax 0.1 | iank | NetHack 3.4.3 | 80% | Provides the scroll of leet hax |
| 265 | Seppuku v1.0 | Sebastian Haas | NetHack 3.4.3 | 100% | A samurai may commit seppuku, i.e. honourably kill him/herself. |
| 266 | Seven Deadly Sins 1.0 | GreyKnight | NetHack 3.4.3 | 84% | Occasionally replaces the Riders with 3 of the Seven Deadly Sins. |
| 267 | Shop credit 1.0 | Topi Linkala | NetHack 3.4.3 | 74% | No more credit cloning. |
| 268 | Shopkeeper 0.13 | Arcane Cossack | NetHack 3.4.3 | Not rated | A new role based off the peddlers of the dungeon. |
| 269 | Show BUC v1.0 | Pasi Kallinen | NetHack 3.4.3 | 100% | Adds an option to always show uncursed-status |
| 270 | Show Elbereth in status line | scgtrp | NetHack 3.4.3 | Not rated | Displays 'Elbereth' in the status line if you are currently on an engraved Elbereth tile. |
| 271 | Show Sym v1.2 | Pasi Kallinen | NetHack 3.4.3 | Not rated | Shows the object class symbol in obj class title names in menus where the obj class symbol acts as a group accelerator key. |
| 272 | Silver Burns v4 | Joshua Kwan | NetHack 3.4.3 | 100% | Player polymorphed into a silver-hating monster will take damage from worn silver items |
| 273 | Simplemail for dgamelaunch 1.0 | Benjamin Schieder | Slash'em 0.0.7E6F2 | Not rated | This adds mail support for dgamelaunch to SLASH'EM 0.0.7E7 |
| 274 | Sitting | Arthur O'Dwyer | NetHack 3.4.3 | 100% | New interactions for #sit |
| 275 | skeleton key patch 0.1 | Haakon Studebaker | NetHack 3.4.3 | Not rated | Skeleton keys are now made of bone |
| 276 | Snakeskin v1.0 | Benjamin Schieder | NetHack 3.4.3 | 90% | Adds a new artifact robe, Snakeskin |
| 277 | Sortloot v1.0 | Jukka Lahtinen | NetHack 3.4.3 | Not rated | Item lists can be sorted alphabetically by description when you loot or apply containers or pick up something. |
| 278 | Sortloot 0.1 | Benjamin Schieder | Slash'em 0.0.7E7 | Not rated | Port of the sortloot patch for Slash'em 007E7 |
| 279 | Splittable #adjust v1.0 | Sam Dennis, conditionalized by Jukka Lahtinen | NetHack 3.4.3 | 100% | Lets you use count with the #adjust command, splitting a stack of items to two inventory letters. |
| 280 | Spore Colony v1.0 | Michael Hedera | NetHack 3.3.1 | 90% | Adds a new type of special room that contains gas spores |