ARC-AGI-3: games that don’t tell you the rules ARC‑AGI‑3 gives an agent a game environment, without an explanation of what it is seeing. At each step, the agent receives a 64×64 grid of 16 color indices and a set of legal actions. The environment supplies no object list, rule sheet, stated goal, or shaped reward. There is only one way to make progress: the physicist’s way. The agent must act while its model of the game is still provisional, forming hypotheses about what the grid represents, how ...