Multi-Agent Reinforcement Learning DQN, DDPG and MADDPG implementations to play tag in OpenAI's multi-agent particle environment. DQN 1 vs 1 DQN 1 vs 2 DQN 2 vs 1 DDPG 1 vs 1 DDPG 1 vs 2 DDPG 2 vs 1 MADDPG 1 vs 1 MADDPG 1 vs 2 MADDPG 2 vs 1