itch.io

A collection or bundle of assets together as a single download or purchase

Presenting gameplay from the perspective of the player character's eyes, typically rendering a 3D environment. This view allows for immersive exploration and interaction, often used in shooter, adventure, and simulation games.

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

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

Unreal Engine is a 3D game creation tool