Gymnasium/docs/environments.md

# Environments

The gym comes prepackaged with many many environments. It's this common api around many environments that makes the gym so great. Here we will list additional environments that do not come prepacked with the gym. Submit another to this list via a pull-request. 

_**NOTICE**: Its possible that in time OpenAI will develop a full fledged repository of suplimental environments. Until this this bit of markdown will suffice._

## PGE: Parallel Game Engine

PGE is a FOSS 3D engine for AI simulations, and can interoperate with the Gym. Contains environments with modern 3D graphics, and uses Bullet for physics.

Learn more here: https://github.com/222464/PGE

## gym-inventory: Inventory Control Environments

gym-inventory is a single agent domain featuring discrete state and action spaces that an AI agent might encounter in inventory control problems. 

Learn more here: https://github.com/paulhendricks/gym-inventory