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The 3d20 system is the role-playing game system used in Neuroshima and Monastyr.[1] Like the d20 System, it uses twenty-sided dice, but unlike that system it most typically uses three.
- ^ Tristan (May 21, 2004). "Review of Neuroshima". Review of Neuroshima - RPGnet RPG Game Index. Archived from the original on Dec 15, 2018. Retrieved Feb 7, 2024.