Google Research Football

This repository contains an RL environment based on open-source game Gameplay Football.
It was created by the Google Brain team for research purposes.

Useful links:

• (NEW!) GRF Kaggle competition - take part in the competition playing games against others, win prizes and become the GRF Champion!
• GRF Game Server - challenge other researchers!
• Run in Colab - start training in less that 2 minutes.
• Google Research Football Paper
• GoogleAI blog post
• Google Research Football on Cloud
• Mailing List - please use it for communication with us (comments / suggestions / feature ideas)

For non-public matters that you'd like to discuss directly with the GRF team, please use [email protected].

We'd like to thank Bastiaan Konings Schuiling, who authored and open-sourced the original version of this game.

Quick Start

In colab

Open our example Colab, that will allow you to start training your model in less than 2 minutes.

This method doesn't support game rendering on screen - if you want to see the game running, please use the method below.

Using Docker

This is the recommended way to avoid incompatible package versions. Instructions are available here.

On your computer

1. Install required packages

Linux

sudo apt-get install git cmake build-essential libgl1-mesa-dev libsdl2-dev \
libsdl2-image-dev libsdl2-ttf-dev libsdl2-gfx-dev libboost-all-dev \
libdirectfb-dev libst-dev mesa-utils xvfb x11vnc libsdl-sge-dev python3-pip

Mac OS X

First install brew. It should automatically install Command Line Tools. Next install required packages:

brew install git python3 cmake sdl2 sdl2_image sdl2_ttf sdl2_gfx boost boost-python3

To set up pygame, it is also required to install older versions of SDL:

brew install sdl sdl_image sdl_mixer sdl_ttf portmidi

2a. From PyPi package

pip3 install gfootball

2b. Installing from sources using GitHub repository

git clone https://github.com/google-research/football.git
cd football

Optionally you can use virtual environment:

python3 -m venv football-env
source football-env/bin/activate

The last step is to build the environment:

pip3 install .

This command can run for a couple of minutes, as it compiles the C++ environment in the background.

3. Time to play!

python3 -m gfootball.play_game --action_set=full

Make sure to check out the keyboard mappings. To quit the game press Ctrl+C in the terminal.

Contents

• Running training
• Playing the game
  • Keyboard mappings
  • Play vs built-in AI
  • Play vs pre-trained agent
  • Trained checkpoints
• Environment API
• Observations & Actions
• Scenarios
• Multi-agent support
• Running in docker
• Saving replays, logs, traces

Training agents to play GRF

Run training

In order to run TF training, install additional dependencies (or alternatively use provided Docker image):

• Update PIP, so that tensorflow 1.15 is available: python3 -m pip install --upgrade pip setuptools
• TensorFlow: pip3 install tensorflow==1.15.* or pip3 install tensorflow-gpu==1.15.*, depending on whether you want CPU or GPU version;
• Sonnet: pip3 install dm-sonnet==1.*;
• OpenAI Baselines: pip3 install git+https://github.com/openai/baselines.git@master.

Then:

• To run example PPO experiment on academy_empty_goal scenario, run python3 -m gfootball.examples.run_ppo2 --level=academy_empty_goal_close
• To run on academy_pass_and_shoot_with_keeper scenario, run python3 -m gfootball.examples.run_ppo2 --level=academy_pass_and_shoot_with_keeper

In order to train with nice replays being saved, run python3 -m gfootball.examples.run_ppo2 --dump_full_episodes=True --render=True

In order to reproduce PPO results from the paper, please refer to:

• gfootball/examples/repro_checkpoint_easy.sh
• gfootball/examples/repro_scoring_easy.sh

Playing the game

Please note that playing the game is implemented through an environment, so human-controlled players use the same interface as the agents. One important implication is that there is a single action per 100 ms reported to the environment, which might cause a lag effect when playing.

Keyboard mappings

The game defines following keyboard mapping (for the keyboard player type):

• ARROW UP - run to the top.
• ARROW DOWN - run to the bottom.
• ARROW LEFT - run to the left.
• ARROW RIGHT - run to the right.
• S - short pass in the attack mode, pressure in the defense mode.
• A - high pass in the attack mode, sliding in the defense mode.
• D - shot in the the attack mode, team pressure in the defense mode.
• W - long pass in the the attack mode, goalkeeper pressure in the defense mode.
• Q - switch the active player in the defense mode.
• C - dribble in the attack mode.
• E - sprint.

Play vs built-in AI

Run python3 -m gfootball.play_game --action_set=full. By default, it starts the base scenario and the left player is controlled by the keyboard. Different types of players are supported (gamepad, external bots, agents...). For possible options run python3 -m gfootball.play_game -helpfull.

Play vs pre-trained agent

In particular, one can play against agent trained with run_ppo2 script with the following command (notice no action_set flag, as PPO agent uses default action set): python3 -m gfootball.play_game --players "keyboard:left_players=1;ppo2_cnn:right_players=1,checkpoint=$YOUR_PATH"

Trained checkpoints

We provide trained PPO checkpoints for the following scenarios:

• 11_vs_11_easy_stochastic,
• academy_run_to_score_with_keeper.

In order to see the checkpoints playing, run python3 -m gfootball.play_game --players "ppo2_cnn:left_players=1,policy=gfootball_impala_cnn,checkpoint=$CHECKPOINT" --level=$LEVEL, where $CHECKPOINT is the path to downloaded checkpoint.

In order to train against a checkpoint, you can pass 'extra_players' argument to create_environment function. For example extra_players='ppo2_cnn:right_players=1,policy=gfootball_impala_cnn,checkpoint=$CHECKPOINT'.

Frequent Problems & Solutions

Rendering off-screen (on a display-less server / without GPU)

It is possible to do software rendering with MESA. For that, before starting environment you need to create virtual display (assuming you use the default resolution):

Xvfb :1 -screen 0 1280x720x24+32 -fbdir /var/tmp &
export DISPLAY=:1

Note that software rendering significantly increases CPU usage and is slow.