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.

Typically a graphical style where there are one two colors. (A bit can be either on or off, so two options) Commonly black and white, but can be any combination depending on the style the creator is trying to accomplish. 

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

A metroidvania is a game inspired by Metroid and Castlevania

It often involves exploration and gaining new abilities to access new areas or progress.