NULL DUN, by SF Create, is a 2D AI CG roguelike deck-building RPG using the Others engine. In a fantasy kingdom, underground tentacles snatch people and dungeons have fallen. You play a female protagonist, exploring procedural dungeons, shaping a card deck, and surviving turn-based fights. Deep in the Void Dungeon, captured women face a dark fate.
The ongoing build is version 1.2.0, released June 2, 2026. The update adds tabbed settings, a fullscreen toggle, in-dungeon keyboard settings access, revamped help, quit confirmation, a Golem attack adjustment, and a free adult DLC for base owners. The base game is censored; the DLC replaces eight scenes with R18 versions, adds new CGs with six-language subtitles, and allows replay in a gallery. It runs on Windows and supports English, Russian, Japanese, Korean, and Chinese.
Developer's description
A monstrous threat looms over the kingdom: the "tentacles."
Nesting deep underground, they snatch people away and vanish into the dark. One by one, the dungeons across the land have fallen to the kingdom's finest.
A roguelike deck-building RPG. Delve into procedurally generated dungeons, hone your deck with a wide array of cards, and fight for survival. But deep in the Void Dungeon, a fate worse than death awaits the women ensnared by the tentacles...
v1.2.0
Reorganized the Settings screen into tabs (General / Help / Contact)
Added a fullscreen toggle
You can now open the keyboard settings from the in-dungeon settings
Revamped the How to Play help and added a link to the Steam discussion board
Added a confirmation dialog to the Quit button on the title screen
Adjusted the attack power of the first-area boss (Golem)
The adult DLC "NULL DUN - 18+ Adult Content" is now available, free for owners of the base game.
Eight story scenes from the main game are replaced with fully explicit (R18) versions
Includes newly drawn R18 CGs, with subtitles in 6 languages
Once installed, the scenes switch to their R18 versions automatically, and can be replayed anytime from the recollection gallery
※The base game NULL DUN is required to play. All characters are 18 years of age or older.
v1.1.0
New Features
Added "Allow Copying" to Custom Dungeons. Subscribers can copy permitted dungeons and edit / publish them as their own
BGM and floor themes can now be set per floor range. You can also choose the title screen music
Fixes
Fixed the card "Divine Bind" affecting a different area than displayed
Fixed other issues in the Custom Card editor
This update includes many fixes and improvements based on your bug reports and suggestions. Thank you!
We hope you continue to enjoy NULL DUN.
v1.0.4
Added gamepad (controller) support — you can play with a controller alone, from the title screen all the way through the dungeon
On-screen input hints are shown per screen and switch automatically as you move between keyboard and controller
Built for the XInput (Xbox) layout; also works with various controllers through Steam Input
Thank you for your continued support.
v1.0.2
Bug fixes
v1.0.3
Added key rebinding options (Settings screen)
Fixed a bug where pressing buttons during a boss-floor intro scenario could skip the boss fight and advance past the final floor
Fixed a bug where HP would not recover when clearing a boss floor
Fixed a bug where enemies took no damage while spamming movement with auto-attack enabled
Other bug fixes
v1.0.1
Custom Dungeon feature enhancements
Other bug fixes
