title: Openai gym environment for multi-agent games
body: <p>Is it possible to use <a href="https://openai.com/" rel="noreferrer">openai</a>'s <a href="https://gym.openai.com/docs" rel="noreferrer">gym environments</a> for multi-agent games? Specifically, I would like to model a card game with four players (agents). The player scoring a turn starts the next turn. How would I model the necessary coordination between the players (e.g. who's turn it is next)? Ultimately, I would like to use reinforcement learning on four agents that play against each other.</p>