Emtombed: Cooperative

This environment is part of the Atari environments. Please read that page first for general information.

Import	from pettingzoo.atari import entombed_cooperative_v3
Actions	Discrete
Parallel API	Yes
Manual Control	No
Agents	agents= ['first_0', 'second_0']
Agents	2
Action Shape	(1,)
Action Values	[0,17]
Observation Shape	(210, 160, 3)
Observation Values	(0,255)
Average Total Reward	6.23

Entombed’s cooperative version is an exploration game where you need to work with your teammate to make it as far as possible into the maze.

You both need to quickly navigate down a constantly generating maze you can only see part of. If you get stuck, you lose. Note you can easily find yourself in a dead-end escapable only through the use of rare power-ups. If players help each other by the use of these powerups, they can last longer. Note that optimal coordination requires that the agents be on opposite sides of the map, because powerups appear on one side or the other, but can be used to break through walls on both sides (the break is symmetric and effects both halves of the screen). In addition, there dangerous zombies lurking around to avoid.

The reward was designed to be identical to the single player rewards. In particular, an entombed stage is divided into 5 invisible sections. You receive reward immediately after changing sections, or after resetting the stage. Note that this means that you receive a reward when you lose a life, because it resets the stage, but not when you lose your last life, because the game terminates without the stage resetting.

Official Entombed manual

Environment parameters

Environment parameters are common to all Atari environments and are described in the base Atari documentation .

Action Space

In any given turn, an agent can choose from one of 18 actions.

Action	Behavior
0	No operation
1	Fire
2	Move up
3	Move right
4	Move left
5	Move down
6	Move upright
7	Move upleft
8	Move downright
9	Move downleft
10	Fire up
11	Fire right
12	Fire left
13	Fire down
14	Fire upright
15	Fire upleft
16	Fire downright
17	Fire downleft

Version History

• v3: Minimal Action Space (1.18.0)

• v2: Breaking changes to entire API, fixed Entombed rewards (1.4.0)

• v1: Fixes to how all environments handle premature death (1.3.0)

• v0: Initial versions release (1.0.0)

Usage

AEC

from pettingzoo.atari import entombed_cooperative_v3

env = entombed_cooperative_v3.env(render_mode="human")
env.reset(seed=42)

for agent in env.agent_iter():
    observation, reward, termination, truncation, info = env.last()

    if termination or truncation:
        action = None
    else:
        # this is where you would insert your policy
        action = env.action_space(agent).sample()

    env.step(action)
env.close()

Parallel

from pettingzoo.atari import entombed_cooperative_v3

env = entombed_cooperative_v3.parallel_env(render_mode="human")
observations, infos = env.reset()

while env.agents:
    # this is where you would insert your policy
    actions = {agent: env.action_space(agent).sample() for agent in env.agents}

    observations, rewards, terminations, truncations, infos = env.step(actions)
env.close()

API

class pettingzoo.atari.entombed_cooperative.entombed_cooperative.raw_env(**kwargs)