Baldur's Gate 3 mod The Sunless Citadel now available on Nexus Mods

• The mod was created by Batilfly and is available on Nexus Mods as a standalone campaign.
• According to the mod description, the campaign is inspired by the 3rd Edition Dungeons & Dragons module The Sunless Citadel and lasts about 7 to 8 hours.

What happened

The Sunless Citadel has appeared on Nexus Mods as a new custom campaign for Baldur's Gate 3. The project was created by modder Batilfly and is presented in the description as a standalone fan mod, not an official expansion from Larian Studios. The available descriptions call it a standalone custom campaign, meaning the mod is being offered as a separate project rather than as part of an official content update from the developer.

The campaign is based on the 3rd Edition Dungeons & Dragons module of the same name. The description on Nexus Mods says it is an inspired adaptation, while other coverage describes the mod as a short, linear dungeon crawl with new areas, NPCs, quests, and enemies. That positions the project clearly as a compact fan experience within Baldur's Gate 3, focused on self-contained content rather than a large open campaign.

Batilfly says development took about six months. The mod description also lists a playtime of around 7 to 8 hours and notes that it uses its own teleport system because the campaign does not have a minimap. The available information also says players should read the documentation or watch a video before starting so they understand how the campaign works. That detail appears on the mod page and underlines that this is a custom campaign with its own rules and navigation.

The release has also been picked up by several gaming sites, including Game Rant and TheGamer. Their coverage repeats the same core information: the mod is now available, was made by Batilfly, and adds a new Dungeons & Dragons-inspired campaign to Baldur's Gate 3. The external context also says the mod includes new locations, quests, NPCs, and enemies, matching the description of a standalone dungeon-style experience.

Background

The Sunless Citadel is a well-known Dungeons & Dragons name and is now being used as the basis for a Baldur's Gate 3 custom campaign. According to the mod page, the project is built around a compact dungeon experience rather than a large open campaign. The Nexus Mods description explicitly calls it a standalone custom campaign, making the distinction from official Larian Studios expansions clear.

The available information suggests the mod is aimed at players who want a focused, linear adventure inside Baldur's Gate 3. The campaign is described as being built around new content and its own navigation system. That system is needed because the mod does not include a minimap, so a teleport system is used to help players progress through the campaign.

External coverage shows that the mod is being mentioned not only on the Nexus Mods page itself, but also in reporting from Game Rant and TheGamer. Both sources link the release to Batilfly and describe the campaign as a new addition for Baldur's Gate 3 with a clear connection to the classic Dungeons & Dragons module. Their summaries also mention that the mod includes new areas, NPCs, quests, and enemies, reinforcing the picture of a standalone fan campaign.

The mod page also says players should read the documentation or watch a video before starting the campaign. That is a clear sign that installing or using the mod differs from a standard Baldur's Gate 3 playthrough. No technical requirements, compatibility details, or installation caveats are confirmed in the provided information, so those points remain unclear for now.

Sources

• Game Rant: report on The Sunless Citadel for Baldur's Gate 3.
• Nexus Mods: The Sunless Citadel - Custom Campaign mod page.
• TheGamer: report on the release of the custom campaign.