DQN - https://github.com/chagmgang/OnlyDQNRL/tree/master/dqn
On-Policy A2C - https://github.com/chagmgang/OnlyPGRL/tree/master/actor_critic
ppo - https://github.com/chagmgang/OnlyPGRL/tree/master/policy_optimization
a2c_onplicy gif
ppo_cnn gif
history of cnn ppo - time consumed to reach destination