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Games that aim to startle and unnerve the player.

Science-fiction. Commonly including things like aliens, advanced technology, and settings of outer space or distant planets. 

Games that are normally played on a table or other flat surface, such as board games, card games, dice games, miniature wargames, or tile-based games

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.