itch.io

Role-playing games let you assume the role of a protagonist, customizing their abilities, equipment, and appearances. Through exploration, dialogue, and strategic combat, players navigate worlds, uncover lore, complete missions, and level up their characters.

Pretty sure everything is indie on itch.io but just in case you want something extra indie.

Games that can be played by more than one player, either locally or online.

Unity is a game engine for 2D, 3D, AR and more