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.

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

Games which have short playtimes and can usually be completed in one sitting.

Products that involve or comprise source code, including programming games; does not refer to products with their own source code available, open source or not.