Jimao, the 1.4 MB "Chinese AAA Game", Is Saltline: Play the Original Online

The 1.4 MB HTML game that spread through Chinese WeChat groups as "Jimao, a Chinese AAA game" is a renamed copy of Saltline, the FPS Anthropic engineer Felix Rieseberg made with Claude Fable 5.2 from one prompt. What happened, and where to play the original in your browser.

On 10 November 2026, a 1.4 MB HTML file called Jimao · Chinese AAA Game (几猫·国产3A大作) started spreading through Chinese WeChat groups. Open it and you get a first-person shooter in a rain-soaked container port. Its notes claimed it was a Chinese game, "independently developed" with Claude Fable 5.2.

It is Saltline, made by Anthropic engineer Felix Rieseberg with Claude Fable 5.2, translated into Chinese and renamed, with his name removed. The original runs free in your browser:

Saltlineby @felixrieseberg

A rain-soaked container-port FPS that Claude Fable 5.2 built in about eight hours, every model and sound included.

FPS Shooter 3D

Play Details

What happened

According to a report by the Chinese games site 游戏研究社 (Youyanshe), republished by Sina Tech, the earliest public trace of Jimao is from the morning of 10 November, when the file was passed around in group chats with no developer name or contact. Players soon pointed out that it plays exactly like Saltline, and that the source code still contains the name Saltline. The joke that followed: the "AAA" stands for "AI, Anthropic, and 俺拾的" (Chinese for "I picked it up").

Tencent News, Sohu, Zhihu and Bilibili all covered it, mostly asking how a 1.4 MB file can hold a full 3D shooter, and noting how common it has become to rename foreign AI projects and pass them off as original.

How the original was made

Felix gave Claude Fable 5.2 one prompt and no human feedback on the day the model came out. By his account, every model, texture and sound is generated in code in the browser, the run took about eight hours, and it used about 445 million input tokens (mostly cached) and 2.7 million output tokens, roughly $550 at API prices. The file bundles the Three.js renderer, which is how a few megabytes can draw a whole 3D level. Read the full story in Saltline: the FPS Claude Fable 5.2 built from one prompt.

How to play

Cut three uplink relays in the port, then reach the boat while robot dogs and drones close in. Move with WASD, aim and fire with the mouse, right-click to aim down sights, R to reload, Shift to sprint, C to crouch, E to cut a relay. Phones and tablets get on-screen controls. It is heavy: lower the quality in Settings if your browser stutters.