Arcade · 5–15 min · Free

Saltline

A photoreal FPS in a rainy container port. Needs a free Claude account to play.

OUR TAKE The one that started it. Worth the login; the best browser FPS yet.

How to play

You need to be signed in to Claude to open the artifact; anonymous visitors get a Cloudflare check and then a login wall.
Once it loads, click into the scene: WASD moves, the mouse looks and shoots, and the artifact shows its own control hints on start.
Cut the three uplink relays hidden around the port while drones and robot dogs hunt you, then get out.

Play it on a laptop with a real GPU — this is a full 3D scene and it will crawl on integrated graphics.
The drones spot you by line of sight; break it behind containers rather than trying to outrun them.
Do the relays in the far corners first — the dogs patrol the middle and hunting backwards through the port is worse.
Anthropic's engineer built it in 8 hours with no human feedback; the source is on GitHub (realcodebear/saltline-fable-5.2) if you want to read it.

First-person arena duels: one life a round, twelve weapons, first to five.

A wuxia duel on a misty mountain pass: parry, dodge, punish. In Chinese.