Issues

• Support arbitrary Gymnasium spaces for env.state()

  enhancementhelp wanted
  Farama-Foundation/PettingZoo#1483 · Filter by author virgilt opened on Sep 27, 2026

• Retire SuperSuit after PettingZoo replacements are released

  documentationenhancement
  Farama-Foundation/PettingZoo#1482 · Filter by author virgilt opened on Sep 27, 2026
  1

• Account for SuperSuit’s remaining public APIs before retirement

  enhancement
  Farama-Foundation/PettingZoo#1481 · Filter by author virgilt opened on Sep 27, 2026

• Replace SuperSuit vectorization used by PettingZoo training workflows

  enhancementhelp wanted
  Farama-Foundation/PettingZoo#1480 · Filter by author virgilt opened on Sep 27, 2026
  1

• Remove SuperSuit usage from PettingZoo’s maintained examples and documentation

  documentationhelp wanted
  Farama-Foundation/PettingZoo#1479 · Filter by author virgilt opened on Sep 27, 2026

• Expose migrated wrappers through pettingzoo.wrappers

  enhancementhelp wanted
  Farama-Foundation/PettingZoo#1478 · Filter by author virgilt opened on Sep 27, 2026

• Add Parallel action clipping to complete SuperSuit clip_actions_v0 coverage

  enhancementhelp wanted
  Farama-Foundation/PettingZoo#1477 · Filter by author virgilt opened on Sep 27, 2026

• Port SuperSuit resize_v1 to PettingZoo wrappers

  enhancementhelp wanted
  Farama-Foundation/PettingZoo#1471 · Filter by author virgilt opened on Sep 27, 2026
  1

• Verify SMAC and SMACv2 third-party compatibility

  documentationhelp wanted
  Farama-Foundation/PettingZoo#1468 · Filter by author virgilt opened on Sep 27, 2026
  1

• Correct the action-masking tutorial’s declared observation space

  bugdocumentationgood first issue
  Farama-Foundation/PettingZoo#1467 · Filter by author virgilt opened on Sep 27, 2026
  1

• Make parallel_api_test sample actions from masks in infos

  bughelp wanted
  Farama-Foundation/PettingZoo#1466 · Filter by author virgilt opened on Sep 27, 2026
  1

• [Bug Report] MultiEpisodeParallelEnv returns a step tuple keyed to two different agent sets

  Farama-Foundation/PettingZoo#1460 · Filter by author DenisDrobyshev opened on Sep 11, 2026

• MA ALE Migration

  Farama-Foundation/PettingZoo#1451 · Filter by author jkterry1 opened on Sep 5, 2026

• [Deprecation Notice] Replacing the old method of env creation in favor of Gymnasium-like "make"

  in progress
  Task

  Farama-Foundation/PettingZoo#1392 · Filter by author Trenza1ore opened on Jul 10, 2026

• Better Documentation Gifs for Multiwalker, Cooperative Pong and Pursuit

  Farama-Foundation/PettingZoo#1385 · Filter by author jkterry1 opened on Jul 6, 2026
  1

• Migrate applicable classic environments to openspiel via shimmy

  help wanted
  Farama-Foundation/PettingZoo#1366 · Filter by author jkterry1 opened on Jun 24, 2026
  2

• Migration to pettingzoo.wrappers

  enhancementhelp wanted
  Farama-Foundation/PettingZoo#1365 · Filter by author jkterry1 opened on Jun 24, 2026
  18

• Port multiwalker from box2d to pymunk following gymnasium port

  Farama-Foundation/PettingZoo#1364 · Filter by author jkterry1 opened on Jun 24, 2026

• [Bug Report] Possible Tic Tac Toe Logical Error

  bug
  Farama-Foundation/PettingZoo#1332 · Filter by author jkterry1 opened on May 24, 2026
  3

• [Question] Why does .state() function output is forced to be an ndarray ? (following the official api)

  question
  Farama-Foundation/PettingZoo#1326 · Filter by author MathieuFonsProjects opened on Mar 27, 2026
  4

• [Bug Report] Cooperative pong wall bounce physics is wrong

  bug
  Farama-Foundation/PettingZoo#1289 · Filter by author dm-ackerman opened on Apr 16, 2025
  7

• [Proposal] Flexibility with _was_dead_step

  enhancement
  Farama-Foundation/PettingZoo#1262 · Filter by author AlexAdrian-Hamazaki opened on Feb 10, 2025
  1

• [Question] What is "dead step" and when do I use _accumulate_rewards?

  question
  Farama-Foundation/PettingZoo#1260 · Filter by author wpm opened on Feb 9, 2025
  3

• [Question] What am I to make of this vague warning in api_test.py about observation space type?

  question
  Farama-Foundation/PettingZoo#1259 · Filter by author wpm opened on Feb 8, 2025
  2

• [Proposal] Proper initialization of the custom CNNmodel in the RLlib tutorial

  enhancement
  Farama-Foundation/PettingZoo#1253 · Filter by author jangroter opened on Dec 18, 2024
  5