gym-super-mario-bros 2.1.1

Super Mario Bros. for OpenAI Gym

gym-super-mario-bros

An OpenAI Gym environment for Super Mario Bros. & Super Mario Bros. 2 (Lost Levels) on The Nintendo Entertainment System (NES).

Installation

The preferred installation of gym-super-mario-bros is from pip:

pip install gym-super-mario-bros

NES Emulator

gym-super-mario-bros uses FCEUX to emulate NES games. Make sure it's installed and in your $PATH.

Unix

sudo apt-get install fceux

Mac

brew install fceux

Usage

Python

You must import gym_super_mario_bros before trying to make an environment. This is because gym environments are registered at runtime.

import gym_super_mario_bros
env = gym_super_mario_bros.make('SuperMarioBros-v0')

done = True
for step in range(5000):
    if done:
        state = env.reset()
    state, reward, done, info = env.step(env.action_space.sample())

env.close()

NOTE: gym_super_mario_bros.make is just an alias to gym.make for convenience.

Command Line

gym_super_mario_bros feature a command line interface for playing environments using either the keyboard, or uniform random movement.

gym_super_mario_bros -e <the environment ID to play> -m <`human` or `random`>

NOTE: by default, -e is set to SuperMarioBros-v0 and -m is set to human.

Environments

These environments allow 3 attempts (lives) to make it through the 32 levels of the game. The environments only send reward-able game-play frames to agents; No cut-scenes, loading screens, etc. are sent from the NES emulator to an agent nor can an agent perform actions during these occurrences. If a cut-scene is not able to be skipped by hacking the NES's RAM, the environment will lock the Python process until the emulator is ready for the next action.

Environment	Game	Frameskip	ROM	Screenshot
SuperMarioBros-v0	SMB	4	standard
SuperMarioBros-v1	SMB	4	downsample
SuperMarioBros-v2	SMB	4	pixel
SuperMarioBros-v3	SMB	4	rectangle
SuperMarioBrosNoFrameskip-v0	SMB	1	standard
SuperMarioBrosNoFrameskip-v1	SMB	1	downsample
SuperMarioBrosNoFrameskip-v2	SMB	1	pixel
SuperMarioBrosNoFrameskip-v3	SMB	1	rectangle
SuperMarioBros2-v0	SMB2	4	standard
SuperMarioBros2-v1	SMB2	4	downsample
SuperMarioBros2NoFrameskip-v0	SMB2	1	standard
SuperMarioBros2NoFrameskip-v1	SMB2	1	downsample

Individual Levels

These environments allow a single attempt (life) to make it through a single level of the game.

Use the template

SuperMarioBros-<world>-<level>-v<version>

where:

• <world> is a number in {1, 2, 3, 4, 5, 6, 7, 8} indicating the world
• <level> is a number in {1, 2, 3, 4} indicating the level within a world
• <version> is a number in {0, 1, 2, 3} specifying the ROM mode to use
  • 0: standard ROM
  • 1: downsampled ROM
  • 2: pixel ROM
  • 3: rectangle ROM
• NoFrameskip can be added before the first hyphen to disable frame skip

For example, to play 4-2 on the downsampled ROM, you would use the environment id SuperMarioBros-4-2-v1. To disable frame skip you would use SuperMarioBrosNoFrameskip-4-2-v1.

Citation

Please cite gym-super-mario-bros if you use it in your research.

@misc{gym-super-mario-bros,
  author = {Christian Kauten},
  title = {{S}uper {M}ario {B}ros for {O}pen{AI} {G}ym},
  year = {2018},
  publisher = {GitHub},
  howpublished = {\url{https://github.com/Kautenja/gym-super-mario-bros}},
}