Kindlefall
A free top-down 3D action roguelite in the browser: ten burning floors, six heroes, ten bosses and 270+ boons. The code was written by AI coding agents under the solo developer's direction.
Official site kindlefall.com, verified Nov 3, 2026. Linked as “Play free” from the game's official site kindlefall.com and listed in its press kit as the play address.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleasedFree
Runs in a desktop browser. No download.
Browser (no download) · Official link verified Nov 3, 2026.
About Kindlefall
Kindlefall is a free top-down 3D action roguelite that runs in a desktop browser, with no download or account. The First Flame fell from the sky and burned its way into the earth, and you play one of the Ember-born, descending ten floors it carved, from a burning library and a graveyard of knights to a clock built from bones, a drowned cathedral and the hearth where it began. Each hero has a role and their own combo, a dodge with invulnerability frames, a guard-breaking spell and healing flasks: the Ember Knight, Barbarian, Rogue, Pyromancer, the Hollow, who rises once per floor, and the Lancer. Rooms seal behind you; shrines between fights offer three of more than 270 boons and relics, every floor ends with a multi-phase boss, and there are mini bosses, secret duels behind cracked walls, puzzle rooms, mimics and a superboss. The enemy that kills you earns a name and comes back in a later run. Between runs, banked souls buy permanent upgrades at the Hearth, and there are a Daily Descent, Boss Rush, Guardians, the Gauntlet and New Game+ with Ascension, with five save slots. The developer describes it as Dark Souls meets Zelda meets Hades. Per the press kit, it was made with AI coding agents under the direction of solo developer Rudy Faile, who calls it one of the first games they have truly vibe-coded; the agents wrote the code, built the game's own 3D models and generated the music and sound in code, alongside CC0 model packs. It plays with keyboard and mouse or a controller.
How it was built
Partially verifiedThe press kit says: “Kindlefall was made with AI coding agents under Rudy Faile's direction. They wrote the code, built the game's own 3D models (the spiders and bosses among them, with CC0 model packs as inspiration), and generated the music and sound effects in code.” The 14-part devlog describes the loop: the developer played each build and wrote notes, and the AI turned them into changes, tested them with a bot that plays the game headless and shipped. During an overnight sprint the main AI session became an orchestrator owning the core files and the tests, with specialist sub-teams owning floors, NPCs, boons and heroes. No tool or model is named anywhere we read.
- DeveloperDevlog part 1: “Most of the code was written by AI, directed and playtested by a person with an Xbox controller who said, often bluntly, what felt wrong.” — Kindlefall (Rudy Faile)
- DeveloperThe developer on Hacker News: “It's also one of the first games I've ever truly "vibe-coded" - every other game i've made in the past has been the traditional way.” — Hacker News (djbiccboii)
Per devlog part 1, three.js and ES modules with no build step for the game code, served by a small Python script; about 28,000 lines of JavaScript at that point. The art started from the CC0 KayKit packs (dungeon pieces, adventurers and skeletons), merged into single skinned meshes with a toon shader, bloom and a colour grade; later the agents built monsters with no kit model, and all 237 boon icons, in code. Every sound effect and piece of music is rendered offline by Python synthesis code, with a few CC0 Kenney recordings layered under it. A test bot clears every floor before each build ships.
- Engine / framework
- Three.js
- Languages
- JavaScript, Python
- Team size
- 1 (solo)Developer ReportedKindlefall (Rudy Faile)
- Initial build time
- About a week for the version posted on 13 Oct 2026 (“I made this game last week”)Developer ReportedHacker News (djbiccboii)
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“Most of the code was written by AI, directed and playtested by a person with an Xbox controller who said, often bluntly, what felt wrong.”Verification notes: The AI claim rests on the press kit (“made with AI coding agents under Rudy Faile's direction. They wrote the code…”), devlog part 1 (“Most of the code was written by AI”) and the developer's Show HN reply of 13 Oct 2026, all re-read on 4 Nov 2026. No tool or model is named in the press kit, the devlog index or any of the 14 devlog parts, so the tool is undisclosed. Developer name and solo status from the press kit's fact sheet; the link to the Hacker News account rests on the Show HN post linking kindlefall.com. Counts (10 floors, 6 heroes, 270+ boons and relics) are from the site and press kit for build .63 of 26 Oct 2026; the Show HN reply gave 7 floors, 5 heroes and 250 boons at the time. The play page loaded on 4 Nov 2026 (English); it loads the game module and a hosting SDK, and we did not scan every imported module, but no source mentions AI used during play. Devlog part 8 says a free demo followed by a paid game was the plan at the time; the site's FAQ now says the whole game is free and that the developer makes no money from it (donations are accepted). Nothing is listed on Steam. The Dark Souls, Zelda and Hades comparison is the developer's own. Location is not stated. The game was not played.
Development history
- One night in development
An overnight sprint adds Floors IV to VII, a fifth hero, NPCs with a storyline, an ending, Boss Rush, New Game+ and about 150 new sounds; the AI splits itself into an orchestrator and specialist sub-teams, per the devlog.
DeveloperKindlefall (Rudy Faile) The developer posts the game on Hacker News as a Show HN.
ObservedHacker News (djbiccboii)Build .63, the Descent: three new floors (ten in all), a sixth hero, hero roles, the Daily Descent, Guardians and five save slots.
DeveloperKindlefall (Rudy Faile)
Game performance
Each figure measures something different — concurrent players, owners, downloads and sales are never interchangeable and are never added together. Labels show where each number comes from.
Browser (official site)
Free to play in a desktop browser with no download or account, per the press kit; no mobile or touch support yet. Saves are kept on every floor.
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
Sales & revenue (all platforms)
Browser game — there are no downloads to count.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| Show HN: Kindlefall – a full-fledged 3D ARPG in the browser, built with Three.js Hacker News (djbiccboii) | Social post | Oct 13, 2026 | Nov 3, 2026 |
| Kindlefall: a free action roguelite you play in your browser Kindlefall (Rudy Faile) | Official site | Not confirmed | Nov 3, 2026 |
| Press kit · Kindlefall Kindlefall (Rudy Faile) | Official site | Not confirmed | Nov 3, 2026 |
| From Idea to Prototype (Making Kindlefall, part 1) Kindlefall (Rudy Faile) | Devlog | Not confirmed | Nov 3, 2026 |
| The overnight sprint (Making Kindlefall, part 2) Kindlefall (Rudy Faile) | Devlog | Not confirmed | Nov 3, 2026 |
| Changelog · Kindlefall Kindlefall (Rudy Faile) | Official site | Not confirmed | Nov 3, 2026 |
