Action · Simulation · made with Claude
Grand Quack Auto
Honk your way through a city as a rubber duck and escalate the chaos.
About Grand Quack Auto
You are a rubber duck loose in a city, and your main tool is a honk button. In Grand Quack Auto, the more havoc you cause, the further the duck climbs from its humble start as Lil' Quacker, and each stage of the climb raises the stakes.
It borrows the antics of open-city crime games and the mischievous animal energy of a goose prank sim. At the top of the climb waits a gun-wielding persona called Duck Norris, so a tiny noisemaker ends up a full-blown menace. The joke keeps escalating, and the tone stays silly throughout.
According to the creator, the code for this Vibe Jam 2026 entry was written entirely by AI with Claude Code, and the city is built in Three.js. It also runs on phones.
How it was made
All of the code was written by AI. Source: Vibe Jam 2026 submission form.
Evidence: the creator's own account.
- AI provider
Anthropic- AI tools
- Claude Code
- Engine
- Three.js
- Genre
Action, 
Simulation- Players
- Single player
Screenshots
Questions about Grand Quack Auto
Is Grand Quack Auto free to play?
Yes. Grand Quack Auto runs in your web browser at no cost, with no download or account needed.
Which AI was used to make Grand Quack Auto?
Grand Quack Auto was made with Claude Code and Claude. All of the code was written by AI, according to the Vibe Jam 2026 submission form.
Can I play Grand Quack Auto on my phone?
Yes. Grand Quack Auto supports mobile browsers.
Who made Grand Quack Auto?
Grand Quack Auto was made by UdayMydam. See their profile on GamesByAI for their other games.
More like Grand Quack Auto
A Game About Capybaras Delivering Food
Drive capybaras around a cozy open world delivering food without toppling the fruit stack.
Claude · Simulation 
Fanto's Mega-Mart
Race through a haunted grocery store at rocket speed, grabbing items as you go.
Null Range
Fly a first-person spacecraft and dogfight other pilots online
WenWare
Guess the place and year of a 360-degree historical scene.
Kanso
Grow and tend digital bonsai trees in calm, pretty scenes.
Sunset City - The Dark Tower
Climb toward the Black Tower while sneaking past guards who watch the city.
Claude · Action
