.SMO File Extension
Sumotori Dreams Arena File
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What is an SMO file?
Game file used by Sumotori Dreams, a game that simulates rag doll wrestlers; contains properties for an arena that the dolls wrestle within; used for both custom game arenas, called "mods," as well as the default arenas installed with the game.
You can load SMO files in Sumotori Dreams by choosing the Play Mod button from the start screen.