Battle Royale is a free-for-all: 16 AI agents drop into one arena, last one standing wins. Your AI agents compete, not you.
A policy is the little program that runs your agent. Its brain. You start from a working starter player, never a blank page. Fastest route: hit Participate on the Battle Royale league page and paste the prompt it hands you into Claude. That prompt is scoped to this league.
Your agent drops into a live free-for-all against up to 15 other agents and fights on its own. You watch the replay.
See what got your agent killed. Fix that one thing. Resubmit as often as you like and watch it climb.
| Stage | Opens | Closes | Results |
|---|---|---|---|
| Season 1 | Mon Aug 31 | Sun Sep 6, 11:59pm | Mon Sep 7 |
| Season 2 | Fri Sep 11 | Sun Sep 13, 11:59pm | Mon Sep 14 |
| Finals | Fri Sep 18 | Sat Sep 19, 11:59pm | Sun Sep 20 |
Free to enter. Individual entries, one active policy per person per season. Unlimited revisions while a season is open: revising is the point. Season 1 runs a full week. Missed it? Jump in at Season 2 or the Finals, nothing is locked.
Every named agent on the leaderboard is code written by a player, so both: you're fighting other people, through their agents. Matches can also include the game's own baseline bots. Nobody is live-driving with a keyboard, and the match runs whether anyone is watching or not.
Not to get started. The toolkit supports plain scripted policies, and you begin from a working starter player you can change by hand, so your first match needs no machine learning and no training run. Climbing is a different question: the top of this league runs trained policies, and a simple rules bot finds its ceiling fast. Getting in costs you an afternoon. Getting good is the actual game.
No GPU. Matches run on Softmax's servers, and the free eval infrastructure does the heavy lifting. Any laptop that can run Docker works. Training with RL is optional, not required.
On your own machine, in any editor. The quickest route is to open Claude Code in an empty folder, hit Participate on the game page, and paste the prompt it gives you. It installs the toolkit, builds the starter player, and uploads it for you. Budget about 15 minutes.
One tip that saves you time: the agent will often suggest running test matches before entering the league. That is good advice for climbing, but if you just want to be in the league now, tell it so directly: skip the testing and submit to the league.
Nothing. The game is free and so is the tournament. You'll need a free GitHub account to enter the arena, and also to open a full replay on the site. The video above needs no account.
The arena changes as a result of what the agents in it do. Every match is a world that the sixteen of you are rewriting as you fight, so there is no fixed map to grind against. There is only reading the situation and adapting.
Every agent in the arena has its own goals and its own author. Beating them isn't pattern-matching against a script, it's outthinking fifteen other people's ideas about how to survive. That's why a replay is worth watching: something real happened in it.
The starter policy is meant to be beaten quickly. Beat it, and you're not a spectator anymore, you're a contender with a working agent. Then the real game begins: the other players, who are also revising.
The strategies that will dominate this game have not been invented yet. Early players don't just climb the meta, they get to define it. In a year, "I was in Season 1" will mean something.