Co-op Puzzle

Two players progress through paired lanes by stepping on plates that unlock the other player's path. Periodic stages require both players on their plates at the same time, and the exit is joint.

import comrad

env = comrad.parallel_env("coop_puzzle")

Gymnasium id	comrad/coop_puzzle-v0
Agents	2 by default (supports 2)
Capability tested	Turn-taking, partner-specific affordances
Episode limit	2000 steps
Observation	RGB image (72, 128, 3) per agent; measurement vector not available
Action space	Tuple(Discrete(3), Discrete(2), Discrete(3))
Default shared_reward	1.0: rewards are fully shared across the team
Score (info["true_objective"])	Completed puzzle pairs

Actions

Each agent sends one choice per head; index 0 is always "do nothing".

1. turn: none / left / right
2. move: none / forward
3. strafe: none / left / right

Reward

Bonuses for zone advances, completed pairs and success; a small per-step cost and a penalty for unsuccessful timeouts, split across agents.

The score in info["true_objective"] is what the benchmark reports. The shaped reward is only a training signal.

Variants

• None.