Cinderfall
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About Cinderfall
A free 3D fantasy arena: 10 champions with their own kits and combos, fought as 1v1 duels, 2v2 skirmishes or a co-op boss raid. Purely vibe coded; no sign-in needed.
A 3D fantasy arena in the browser. Pick a champion and fight a 1v1 duel, a 2v2 skirmish beside an ally, the Gorrath boss ('Bring down the Ashen Tyrant together'), or practice against a sparring partner with a damage meter. Solo play is against bots; online play matches you with other people.
The live build shows 10 champions: Fire Mage, Rogue, Warrior, Ranger, Paladin, Warlock, Resto Druid, Feral Druid, Ele Shaman and Resto Shaman - the creator says 2 more are coming, and that every class has its own kit, combos, animations and sounds. Roster mix runs from casters and melee fighters to healers.
Four battlegrounds at launch: The Ashen Sanctum, The Ashen Fortress, The Emberleaf Grove and The Moonwell Cloister. Bot difficulty comes in three grades - Apprentice, Veteran and Gladiator.
How Cinderfall was made with AI
The creator says he spent 10 days on the game and that it is 'purely vibe coded, from the 3D models and animations to the sound, spell effects, and everything else'. He credits the models used: opus 5.5, fable 5.1, astra 6, sol 6.1, SWE 2 and K3. For balance he says he ran thousands of AI fights between every class, keeping win rates between 40% and 60% across matchups. An MIT CSAIL survey of AI-for-3D work also indexed an earlier Cinderfall PvP arena demo he built in about four hours in September 2026.
Made by JUMPERZ (@jumperz).
How to play
Any modern browser; the game itself says no sign-in is needed - guest play works out of the box. The creator calls it very early, with in-game buttons for feedback and bug reports.
| 1 / 2 | Your attacks |
|---|---|
| 3 | The big one (ultimate) - every champion uses the same bar |
| Space / Q / E / X / R | Movement and ability keys, shared across champions |
Quick facts
- 10 classes (creator says 2 more coming), each with its own kit, combos, animations and sounds
- Modes: 1v1 duel, 2v2 skirmish, co-op boss (Gorrath, the Ashen Tyrant), practice
- Four battlegrounds: Ashen Sanctum, Ashen Fortress, Emberleaf Grove, Moonwell Cloister
- Balance tuned by thousands of AI-vs-AI fights, 40-60% win rates
- Models credited: opus 5.5, fable 5.1, astra 6, sol 6.1, SWE 2, K3
- No sign-in needed; guest play
- Earlier ~4-hour Cinderfall demo indexed by an MIT CSAIL survey in September 2026
Questions about Cinderfall
What is Cinderfall?
A free 3D fantasy arena game that runs entirely in your browser, made by @jumperz. You can fight 1v1 duels, 2v2 skirmishes, take on the Gorrath boss co-operatively, or practice against bots - online or solo.
How many classes are there?
Ten in the current build - Fire Mage, Rogue, Warrior, Ranger, Paladin, Warlock, Resto Druid, Feral Druid, Ele Shaman and Resto Shaman - with the creator saying two more are coming. Every class has its own kit, combos, animations and sounds.
Do I need an account?
No. The game says 'Ready when you are. No sign-in needed' - guest play works out of the box.
How was it balanced?
Per the creator, he ran thousands of AI fights between every class and kept win rates between 40% and 60% across matchups, so any class can win.
Tips for Cinderfall
- Every champion uses the same ability bar (1 and 2 for attacks, 3 for the big one, plus Space/Q/E/X/R): learn the bar once, then swap classes freely.
- Start in Practice with the damage meter to learn a champion's combo before queueing a 2v2.
Sources: x.com, cinderfall-arena.vercel.app, mit-cdfg.github.io. Last checked .
