itch.io

Focused on imparting a skill, lesson, or piece of information to its player that would be helpful to them in other aspects of life, such as a faster typing ability or knowledge about a period in history.

Utilizing content created by algorithms rather than human made content. Often utilizes a "seed," a relatively small string that is used to control the randomization algorithm that generates the entire world.

Self-published, small-circulation booklets of original and appropriated texts and images on controversial or niche topics in unpolished or unusual layouts, or some combination of some of that, maybe.