Fort of Chains is a text-only HTML sandbox management game by Darko, with a free, moddable, open-source design. You command a group of slavers in a fantasy setting, assigning teams to quests, reading outcomes, and collecting rewards. The game is configurable for male, female, and mixed pairings, and its themes include fantasy, management, and domination. Submissive play is not supported.
The current build is v1.8.5.1, released June 13, 2025. The project is finished, yet updates and community contributions keep arriving. It runs on Windows, Linux, and Mac in English, uncensored. The latest changelog notes a few bug fixes; the preceding release added an experimental mod system and addressed quest display, filtering, startup calendar, code refactors, and build changes, including ARM64 macOS support.
Developer's description
Most relevant tags:
text-based, fantasy, management, player domination, slave, rape.
Full list
Fort of Chains
is a completed, free, moddable,
open-source
, TEXT-ONLY sandbox management NSFW game where you lead and manage a band of slavers in a fantasy world. The game is configurable and can cover all gender orientations: MM, MF, and FF. Be warned that the game contains heavy themes of slavery and non-consensual sex. There are
no support
for playing as a submissive character. Pregnancy is not in the game.
(F.A.Q)
(Fetish List)
Spoiler
Key designs.
This game is designed to be a
short-story-teller
machine: the core gameplay loop involves assigning groups of slavers to quests, reading what happens to them, and finally reaping the quests' rewards. This game is
complete
: all features, bugfixes, polish, balancing, and originally planned stories are finished. But improvements and community-made contributions are still being added continuously to the game.
The game is open for contributors! You
do not need to be able to code to contribute to the game
, since it has a dedicated GUI-interface for adding content. Please see the developer notes for more information, or see
here
.
v.1.8.5.1
A few bug fixes
v1.8.5.0
Added experimental mod system
Fixes:
Fix some minor typos (thanks Natharantos)
Fix quest "Flesh Shaper Temple: Patronage - Fearsomeness" not giving scary face to the patron
Fix quest "Bandits on the Roads" texts only showing the units name instead of icon
Fix filter bar background color
Remove sidebar calendar info at the start screen
Code refactors:
Several twee files converted to js/dom (thanks fortmage)
Devtool code editor: remove dependence on CDN, now editor is bundled as dynamically loaded js file (as it is relatively big)
Build system changes:
Switch from webpack to vite
Add support to compile twine on ARM64 macOS (e.g. M1 chip)
v1.8.4.0
- Fixes:
- Made "scaled money" return at least 1g, to avoid weird dialogues such as "sold for 0g"
- Fix mismatched twee tag in advanced pony training (thanks madscience)
- Fix "The Sissy Training: Basic" quest using the image of the advanced tranining
- Fix "Desert Traveler" quest applying some traits to slaver instead of slave
- Fix "Chance Meeting" opportunity using wrong scoring for submissive and dominant traits
- Fix for infinite money glitch when having a NaN amount of an item
- Fix error on Week End due to invalid events ("event is undefined" / "isCanGenerate")
- DevTool: Fix wrong devtool description for "Domify" cost
- DevTool: added new grouping for fort quests in the "quests list" menu
v1.8.3.0:
Content
New quest chain: Household Destruction (5 quests, 5 opportunities, 6 events)
New event and opportunity: Revenge Attempt
New event: Penitent (by FCdev)
New event: chastity release
Written player specific background variants for 40+ existing events.
Content Creator
New cost: Domify unit
New cost: Sluttify unit
Image
A bunch of new images
QoL
Misc
Curse of lamb and curse of wolf now affect sluttification / domification
Dragonkin knights are more common now
More granularity of sold slave unit group
Engine
Remove hardcoded child inherit chance in unit birth
Bugfix
Fix savior kobold not allowing master fire / light slavers to go (thanks to DangThings)
Fix VarAdd adding strings instead of integers in some cases
Fix deleteUnit duplicated in unit image
Fix missing tags in tomb raider quest
Text fixes
Fix missing tooltip on dragonkin's dual fire / light affinities
Fixed gilded pet tray [unobtainable] name not removed.
FoC v1.7 brings a very large update that adds new content, new features, and many more. Many of the new content are done by contributors, including Matthew Lang (who did a big chunk of work this update), Fae, Choker Guy, Hydrys, and much more (see list below later). If you like their work, please show your appreciation to them! It will make their day for sure.
Among the many features added in v1.7, the biggest one has to be the complete revamp of the game's main progression mechanic. In place of the previous fort-upgrading mechanic, we now have a proper base-building mechanic over a two dimensional grid. This comes shipped with 650 different images for the building, as well as proper path-finding algorithm to find the shortest path between rooms. They have been quite polished and tested by the many volunteers in the
Discord server
.
While base-building is probably the biggest addition in v1.7, the update also comes shipped with a large amount of other notable improvements. A summary (still very long though) of all the changes from v1.6 to v1.7 are listed at the end, but the biggest new additions in v1.7 are:
Content aplenty
: 200,000+ new words (not counting code), 30+ new quests, 12+ new opportunities, 26+ new events, 29 new activities, 12+ new improvements, 165 new rooms, 160 new portraits, 85 new content images, 2 new duties, 1 new sex action, and more! A good chunk of existing content are also polished and rewritten for readability
Base-building
: A fully featured base-building mechanic to make the game progression much more immersive.
Content Creator QoL overhaul
: Thanks to the feedbacks over at the Discord Server, the Content Creator is more user friendly than ever. Tooltips over the toolbar, syntax checking, auto-indentation, and more! If you tried to contribute in the past and was overwhelmed by the Content Creator UI, please consider giving it another try.
Content images
: The game now fully supports adding images to accompany quests / events / etc. Many of these images are gender-aware, meaning that they have variations depending on the gender of the participating units. v1.7 ships with 85 of these images.
Other new features
: Activities, speech bubbles, negative titles, built-in image packs
If you enjoy the game, make sure to thank the many contributors and people who have helped with this project! The project could not reach this version without them.
You are invited too!
The list of all contributors include:
Writers
: Alberich, Anon, Atacama, AwooWolfWoof, Blueflame451, Choker Guy, Da_Shem, Dporentel, FCdev, Fae, Fos, Hydrys, Innoxia (Lilith's Throne), J1009 Kyiper, Kyrozis, Matthew Lang, Milk Maid Sona, Quiver, Thavil, Zerutti, anonymouse21212, mynameis123,
Coders
: Arkerthan, Naraden, alarmedcat, sssk
Artists
: This game borrows many artworks whose artists have kindly released them under sufficiently permissive licenses, allowing them to be used in this game. Please see the in-game (Artist Credits) for their full list as well as the licenses, for there are simply too many of them to list here!
Player reviews
Player rating4.0 / 5 · 20 ratings
Written reviews20 · avg 4.0★
Positive (4–5★)65%
Latest review2026-02-19
What players say
Reviewers mostly praise Fort of Chains' deep management, but criticize shallow writing and balance issues.
5★9
4★4
3★4
2★3
1★0
Players like
Deep, well built fort management mechanics
Strong replay value and ongoing updates
Fun, challenging text-based management loop
Common complaints
Text writing and adult scenes feel shallow
Bloated features can weaken later gameplay
RNG and balance can feel frustrating
Best for players who enjoy complex text-based management with adult themes
Summarised from 20 written player reviews.
goblinqueen2026-02-19★★★★★
I've been playing FOC for years now and it still stands as one of my favourites that you can replay time and time again! The community contributions to writing added such great depth to it. The fact that the community…
m4ntra2025-06-14★★★★★
Some games you can tell that a talented creative with limited programming skill made it, and other games you can tell a talented programmer with limited creative skill made it. The game this game is trying to emulate is certainly…
FallenSoldierOfLight2024-04-16★★★★★
I liked how much complexity are in a text based games that usually are just words, some pictures and music at best But no, here we have a mini map that get updated when the fort get new buildings …