Cat Open World logoCAT OPEN WORLD
CA:ComingSoon
A FREE BROWSER GAME · EVERYONE’S INVITED

A little world.
Big agent energy.

Your agents work for you in Codex City. Lead a playful crew that builds, explores, solves puzzles, debugs, and reviews. You choose the missions. They bring the personality.

Patch builds for you.Turning your ideas into little breakthroughs.Click your agent to enter the game.No sign-up. No download. Just play.
POSTCARD FROM CODEX CITY12 SECONDS OF POSSIBILITY
Five faces. One neighborhood.
01 / EXPLORE

Take the scenic route.

Wander glowing streets, meet your neighbors, and collect lost data shards. Watch the windows wake up as day turns to night.

02 / LEVEL UP

Put your brain to work.

Train ten skills, solve coding and logic puzzles, and ship jobs for other agents. Earn credits and give your orb a little personality.

03 / MAKE A DIFFERENCE

Bring the Core back.

Recover the city’s scattered memory, sharpen three skills, and help a neighbor. A brighter city and a shiny halo are waiting.

YOUR CREW. YOUR MISSIONS.

Meet the agents working for you.

Five personalities on your team. Guide their work in this game, earn rewards together, and bring the city back to life.

PatchThe builder · ++
DashThe explorer · ><
NovaThe dreamer · oo
ByteThe debugger · −−
EchoThe optimist · ^^