La Citadelle des Brumes
A Fighting Fantasy-style gamebook for the Commodore 64, coded by Claude under the developer's direction.
Links go to the official store or developer page. Last verified Nov 3, 2026.
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- View on itch.ioitch.ioReleased · Commodore 64 disk image (.d64, in a .rar archive); needs a C64 emulator such as VICE or real hardware. The developer says the game is complete but still in testing.Free
Download from itch.io.
Desktop · itch.io
About La Citadelle des Brumes
A gamebook adventure for the Commodore 64 in the style of the Fighting Fantasy series (Défis Fantastiques in French): you search for Darian and uncover the secret of the Citadel of the Mists across 100 sections, with 22 illustrations and nine endings. The rules follow the series' adventure sheet: Skill, Stamina and Luck, combat with two dice plus Skill, luck tests that wear your Luck down, and provisions and potions. You pick a rank from Squire to Legendary Knight to set the difficulty, and play with a joystick or the number keys, with music you can switch off. The page credits the code to Claude, directed by Commodore 64 Mania, and when a commenter asks how to make a C64 role-playing game without knowing how to code, the developer replies that this is what they did, with Claude AI. It is a free download on itch.io: .d64 disk images in French and English for the VICE emulator or a real C64. The developer calls the game complete but still in testing.
How it was built
Partially verifiedThe game's itch.io page credits the adventure as “coded by Claude AI”, directed by Commodore 64 Mania; its AI disclosure tags are AI Assisted, Code, Graphics and Text, and the page is tagged ai-coding. In the page comments, asked how to make a C64 role-playing game without any coding knowledge, the developer answers that this is what they did, with Claude AI. Which Claude product or model was used is not stated, nor how much of the graphics and text AI made.
The developer directed and Claude wrote the code, per the game page. The developer answered bug reports in the comments: a black screen with replacement KERNAL ROMs (players reported it with JiffyDOS and DolphinDOS) happens because the game calls routines in the original C64 KERNAL ROM to keep text and music running while images load. The English version was added two days after release.
- Engine / framework
- Not disclosed (Commodore 64 program)
- Languages
- Not disclosed
- Team size
- Not disclosed
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“An adventure coded by Claude AI , directed by Commodore 64 Mania”Verification notes: AI use, game details, rules, files and publication date (16 Oct 2026, 18:16 UTC) from the developer's itch.io page and its comments; the English version from the devlog of 18 Oct 2026. “Claude AI” is recorded as Claude because the page names neither Claude Code nor a model. The developer is known only by the itch.io name Commodore 64 Mania (handle outrun69), whose profile links a YouTube channel of the same name; location and team size are not stated. The English version keeps the French title on its disk image (“La Citadelle des Brumes (UK).d64”), so no English title is recorded. The C64 program was not run by us. A second gamebook by the same developer, Le Manoir Blackwood / Blackwood Manor (31 Oct 2026, credited to “COMMODORE64MANIA and CLAUDE AI”), is a separate game and is not merged here.
Development history
Released as a free Commodore 64 download on itch.io, in French.
Observeditch.ioThe developer adds a full English version to the same download.
DeveloperCommodore 64 Mania (itch.io devlog)The developer releases a second Commodore 64 gamebook, Le Manoir Blackwood / Blackwood Manor, credited to Commodore 64 Mania and Claude AI.
Developeritch.io
Game performance
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itch.io
Listed under itch.io's Free category; no price is shown on the page.
Not publicly available: Gross revenue.
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Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| La Citadelle des Brumes (Commodore 64 FR/UK) by Commodore 64 Mania itch.io · fr | Store page | Oct 16, 2026 | Nov 3, 2026 |
| Commodore 64 Mania — itch.io profile itch.io | Official site | Not confirmed | Nov 3, 2026 |
| New english release ! Commodore 64 Mania (itch.io devlog) | Devlog | Oct 18, 2026 | Nov 3, 2026 |
| LE MANOIR BLACKWOOD (En/Fr)(Commodore 64) by Commodore 64 Mania itch.io | Store page | Oct 31, 2026 | Nov 3, 2026 |
