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Games that challenge the player with critical thinking to solve levels. 

Inspired by (or directly containing elements of) storytelling and visual design that are otherwise most commonly seen in Japanese animation.

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