> ## Documentation Index
> Fetch the complete documentation index at: https://docs.arcprize.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Game Schema

> Structure and format of ARC-AGI-3 game environments

ARC-AGI-3 games are turn-based environments where agents interact with 2D grids through a standardized action interface. Each game maintains state through discrete action-response cycles.

* Each response contains one or more 2D frame arrays plus game-state metadata.
* Agents respond with an [action](/actions) to interact with the game.

## Game States

| State          | Description                                    |
| -------------- | ---------------------------------------------- |
| `NOT_PLAYED`   | No game has been started                       |
| `NOT_FINISHED` | The game is active and awaiting another action |
| `WIN`          | The objective was completed successfully       |
| `GAME_OVER`    | The run ended without a win                    |

## Grid Structure

* **Dimensions:** Maximum 64x64 grid size
* **Cell Values:** Integer values 0-15 representing different states/colors
* **Coordinate System:** (0,0) at top-left, (x,y) format

## Game ID Format

Game IDs are formatted as `<game_name>`-`<version>`.

`game_names` are stable, but `version` may change as games update.

## Game Available Actions

Each game provides an explicit set of available actions. The actions available vary per game and are stated explicitly so your agent knows what it can do.

To learn about the standardized action interface, see the [Actions](/actions) page.

To see how to retrieve a game's available actions programmatically, see [List Available Actions](/toolkit/list-actions).