NULL DUN [v1.2.0] [SF Create]

July 14, 2026F95

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.

NULL DUN, 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…

Thread Updated: 2026-07-13

Release Date: 2026-06-02

Aliases: NULL DUN 〜触手特化！ぬるぬるダンジョン〜

Developer: SF Create Steam – Website – Youtube – CI-en – DLsite

Censored: Yes

Version: 1.0

OS: Windows

Language: English, +5

Store: Steam – DLsite

Genre:

Deckbuilding Roguelike, 2D Game, 2DCG, Censored, Corruption, Fantasy, Female Protagonist, Groping, Management, Monster, Tentacles, Turn based combat, Virgin

Installation:

1. Extract and run.

Changelog:

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

Developer Notes:

A Rescue a Hundred Years in the Making

The battle to save the captured begins.

—One hundred years ago

Tanya, the kingdom’s mightiest warrior, was ordered to clear the Void Dungeon.

She swore to her childhood friend, the princess, that she would return. She never did.

Freya, the holy saint, defied her father the king to follow her dearest friend into the dungeon—and was never heard from again.

—The present day

Reen, a rookie warrior, joined the army to pay for the medicine her frail sister Elna so desperately needed.

One night, a massive tentacle drags her sister away. The direction it fled—the Void Dungeon.

Plunging in alone, Reen discovers an old diary.

“It has been several days since I followed Tanya into the dungeon—”

The heroes who vanished a century ago. And yet, nowhere does it say they “died.”

What will become of her sister? Are the captured still alive?

The desperate struggle of one weak, untested warrior is about to begin.

Roguelike × Deck-Building × Dungeon Crawling

A true roguelike RPG that fuses turn-based dungeon crawling with card combat.

Ever-shifting layouts. Limited turns. The single card in your hand.

Every choice means life or death.

◆ Dungeon Crawling

Procedurally generated dungeons that reshape themselves with every descent
Slip past enemy sightlines or charge in head-on—the choice is yours
Gather treasure and gold to strengthen your deck
Each floor runs on a turn limit—balancing caution and boldness is the key

◆ Card Combat

Combine a diverse arsenal of cards and seize control of the battle.

Cut down foes up close with “Slash” and “Whirlwind”
Whittle them down safely from afar with “Short Shot” and “Long Shot”
Dominate strategically with the magic of “Thunder” and “Divine Bind”
Weather the worst with healing—”Heal” and “Herb”
Stay nimble and adaptable with mobility cards “Haste” and “Swiftfoot”

◆ Deck Building

Earn new cards each time you clear a floor
Cull the cards you don’t need and refine your deck
Cards level up—the more you nurture them, the stronger they grow
How you build your deck and spend your gold decides victory or defeat

A Cast of Distinct Heroes

Each chapter puts you in control of a different protagonist—the cards you unlock and the way you play transform completely.

Reen—A rookie warrior. Small of stature and raw in skill, yet she braves the Void to save her sister. The hero of the present day.

Tanya—The kingdom’s mightiest warrior. A legendary hero ordered to conquer the Void a hundred years ago.

Freya—The legendary saint. Her gift for magic rivals Tanya’s own. She followed her dearest friend into the dungeon.

Those Held Captive by the Tentacles

Deep within the dungeon, a fate beyond resistance awaits the women caught in the tentacles’ grasp.

Those held too long become “seedbeds,” their bodies offered up as a living source of energy for the tentacles.

Reen, Tanya, Freya, and her sister Elna—their fates rest on how you fight.

(This game contains mature themes and sexual situations, but no explicit content. Fully explicit 18+ content is available separately as an optional DLC, “NULL DUN – 18+ Adult Content” (coming soon). Please see the “Mature Content Description” for details.)

Steam Workshop Support — Endless Dungeons

This title fully supports Steam Workshop. No matter how much you play, the dungeons never run dry.

Create—Combine original cards and settings to build dungeons all your own
Share—Publish your dungeons to the Workshop and reach players worldwide with a single click
Play Endlessly—Subscribe to other players’ creations and take on an ever-growing supply of dungeons
Official Content, Too—Seven official custom dungeons from the developer available at launch, with more added over time

Your imagination becomes the next challenger’s adventure. With the Workshop, NULL DUN is a game you can play forever.

Game Details

Genre: Roguelike × Deck-Building RPG
Playtime: 8–36 hours (to clear every dungeon)
Saving: Auto-save supported, with the option to export your data to a file
Story & Gallery: Replay any element you’ve already seen, anytime—also unlockable via hidden commands
Collection: A card compendium and 32 achievements

A rescue a hundred years in the making—save them, with your own hands.

This work incorporates the use of generative artificial intelligence (AI) in the following areas:
Parts of the artwork, parts of the sound, parts of the story, and localization.

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