It is OpenAI so you can safely assume that it's their PPO workhorse agent. But if you were unsure, they provide repos and papers for further details, both of wh

It is OpenAI so you can safely assume that it's their PPO workhorse agent. But if you were unsure, they provide repos and papers for further details, both of which mention early on the agent ( https://github.com/openai/train-procgen#try-it-out https://github.com/openai/train-procgen#try-it-out and https://cdn.openai.com/procgen.pdf#page=4 https://cdn.openai.com/procgen.pdf#page=4 ).