old_contents: from gym.envs.registration import registry, register, make, spec
  from gym_ple.ple_env import PLEEnv
  # Pygame
  # ----------------------------------------
  for game in ['Catcher', 'MonsterKong', 'FlappyBird', 'PixelCopter', 'PuckWorld', 'RaycastMaze', 'Snake', 'WaterWorld']:
      nondeterministic = False
      register(
          id='{}-v0'.format(game),
          entry_point='gym_ple:PLEEnv',
          kwargs={'game_name': game, 'display_screen':False},
          timestep_limit=10000,
          nondeterministic=nondeterministic,
      )
  
new_contents: from gym.envs.registration import registry, register, make, spec
  from gym_ple.ple_env import PLEEnv
  # Pygame
  # ----------------------------------------
  for game in ['Catcher', 'MonsterKong', 'FlappyBird', 'PixelCopter', 'PuckWorld', 'RaycastMaze', 'Snake', 'WaterWorld']:
      nondeterministic = False
      register(
          id='{}-v0'.format(game),
          entry_point='gym_ple:PLEEnv',
          kwargs={'game_name': game, 'display_screen':False},
          tags={'wrapper_config.TimeLimit.max_episode_steps': 10000},
          nondeterministic=nondeterministic,
      )
  
subject: Replace the timestep_limit call with the new tags api.