BESM stands for "Big Eyes, Small Mouth," which is a tabletop role-playing game (RPG) system designed to facilitate anime and manga-style gameplay. The game was created by Mark C. MacKinnon and first published in the late 1990s. BESM is known for its flexibility, allowing players to create characters and settings that align with various genres found in anime and manga, including fantasy, sci-fi, horror, and more.
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