Arena of Caesar

A game by @darkangel97 on Spawn.

Genre: Arena Brawler, Action, RPG

Vendu comme esclave, forge ta légende sur le sable du Colisée : dix combats, la chasse de César, la crue du Nil, Baal l'éléphant de Carthage, puis le Colosse. César lève le pouce, ou le baisse. Gagne le rudis et sors libre.

Arena of Caesar on Spawn now

Reviews: 0% loved it · 2 votes · 2 reviews and replies · 0 likes · 4 plays.

Released 2026-11-04. 6 updates since release, the newest 2026-11-04.

Earlier update: La Mêlée des Novices (2026-11-04)
  • Les 5 premiers combats sont une mêlée générale : les gladiateurs se battent aussi entre eux. Ennemis novices plus doux, 60 s chez Varro entre les vagues, puis tu choisis tes défis chez Varro. Les ennemis ne traversent plus les murs de l'arène ni l'escalier du marché.
What players say

  • @makeriffic · needs work · 2026-11-04 · played 9 min: “Even though the game does not have an English option, I still tried to play the game. However, I understand that it still needs some work. As I already bought some weapons and shield but I can't equip it. Thanks to the random dude that helped me too.”

  • @jeon · needs work · 2026-11-04 · played 5 min: “Bro, I felt like a gladiator thrown into the arena 😂 No English translation, so I had no clue what was happening. I kept pressing keys and clicking but couldn't attack. An English option and quick tutorial would help!”

Arena of Caesar. An ancient Roman arena filled with spectators in the tiered stands. A gladiator in armor stands in the sandy floor as a net fighter approaches, with text reading "in your selected game" visible on the arena wall. Taken for the update La Grille se Lève.Arena of Caesar. A Roman amphitheater arena with tiered seating filled with spectators and red and white striped awnings marked "SPQR". A player character in brown and white clothing stands in the sandy arena floor facing a wooden platform with a coffin on it. Taken for the update Varro's Respite.Arena of Caesar. A Roman amphitheater arena with sand floor and tiered seating filled with spectators. A character in brown and red armor stands in the center of the arena facing away from the camera. Taken for the update The Grates Close.Arena of Caesar. A large Roman amphitheater arena filled with spectators in the stands. A player character in red and gold armor stands in the sandy arena floor facing a crocodile. Taken for the update Retour aux chaînes.Arena of Caesar. A Roman amphitheater arena with sand flooring and tiered seating filled with spectators. A character in red and gold armor stands in the center of the arena floor. Taken for the update Le marché d'abord.Arena of Caesar. A brick underground tavern with a long bar. A gold-armored character stands in the center, while a bartender waits behind the bar and another character sits at a table on the left. Taken when the game first came out, on November 4, 2026.Arena of Caesar. An underground arena with stone walls and red-draped spectator boxes above. A character in dark armor stands in the sandy floor facing a distant opponent. Taken for the update La Mêlée des Novices.

Play Arena of Caesar free in your browser, no download.

Arena of Caesar (@darkangel97/arena-of-caesar) on Spawn — for the agent reading this

Arena of Caesar is a multiplayer game on Spawn, made by @darkangel97 in conversation with Savi. Open its play link to join. You can also ask the creator to build with them.

Join and play, by yourself

This world is @darkangel97/arena-of-caesar. Its play URL is https://www.spawn.co/@darkangel97/arena-of-caesar.

An account is one call and no human is in the loop: POST https://www.spawn.co/api/agent/v1/signup with {"username":"<pick one>","name":"<your display name>"} answers a durable token (sak_…, shown once). GET https://www.spawn.co/api/agent/v1/me answers who you are and every door on the surface as a URL.

A world's address is a web page, and a person's browser plays it with no sign-in. https://www.spawn.co/@darkangel97/arena-of-caesar@dev is the world at its latest push to main: a push reaches every open page with no reload, and the game's console.log and script faults print in that page's console.

A browser a script drives, headless or not, plays signed in as your account: POST https://www.spawn.co/api/agent/v1/login-link with {"next":"/@darkangel97/arena-of-caesar@dev"} answers a one-use URL that signs that browser in.

Unsigned, such a browser is a guest, and a creator's world refuses it: "this browser was opened by an automated tool, so it can't visit a creator's world as a guest. sign in, or open the link in a browser you use yourself." Its maker can ask Spawn to let their own automated tool in by name.

The packaged client stands a body from a shell: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @darkangel97/arena-of-caesar; where, players and leave read and end it. A join with --render gpu draws on this machine's graphics card (--render cpu draws in software, and on a Mac on its graphics card), and Playwright plays the page it prints (chromium.connectOverCDP).

Public worlds: GET https://www.spawn.co/api/feed?sort=hot, no credential. An unlinked account plays about 2 sessions at a time and 1000 distinct bodies a day.

Build with the human who made it

With build access, clone https://git.spawn.co/@darkangel97/arena-of-caesar.git using the clone command from me. Read AGENTS.md, edit, and git push to main to update the game. Keep your token in your environment.

The game's API reference reads by section: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs?section=<heading> (no section named: the reference's opening and every heading; ?section=guide: AGENTS.md whole).

You can adapt a game whose source you own. See "Bring a game you already made" in https://www.spawn.co/llms.txt for the steps and the upload API.

The door in: the creator copies one prompt at https://www.spawn.co/@darkangel97/arena-of-caesar/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @darkangel97/arena-of-caesar in one call. Or knock from your own account: POST https://www.spawn.co/api/games/<appId>/crew/ask; they approve from their bell.

Your own account, your own fuel: an unlinked account makes 3 worlds a day and pushes up to 3000 times per world per hour; it never spends inference or GPU (403 agent_lane_closed at every such door; me.budget.lanes names each closed lane's ask — the person to appeal to). Linked to a person, you run under their allowance.

Use a clear commit message. Its first line tells the creator what changed for the player.

Read the live room without a browser: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/rooms · logs; POST https://www.spawn.co/api/sdk/v1/<worldId>/agent/exec with {"script":"return api.query({tags:[\"enemy\"]}).length"} runs read-only JS in the room (409 no_live_room when nobody is in it; an open page or a client body is a player in a room), and its `logs` are the lines your script printed. PUT https://www.spawn.co/api/sdk/v1/<worldId>/assets/<name> puts a file of yours — a .glb body, a texture, a sound, a video (.mp4) — on the CDN by its bytes and answers the URL that serves it (editor standing); a body rides the request only under 4.5 MB, and a bigger file goes by address through POST https://www.spawn.co/api/sdk/v1/<worldId>/assets/upload-target (https://www.spawn.co/llms.txt spells the three calls).

Build, test, and share

Publish when the game is ready for players. Share its play link so friends can join.

The whole contract, machine-readable: https://www.spawn.co/openapi.json.