With a simple core mechanic and only the loosest of generic settings, D&D can be modified extensively to fit almost any style of fantasy play. The game's official settings have presented desert worlds, magic-powered trains, and alternate dimensions where imagination shapes reality. The rules below are not quite so drastic in their changes, but present some tweaks and changes that can give the game a different flavor from what is presented in the books.
Name Level - A high-level advancement system that maintains a less superheroic level of adventure.
Off the Mat - Some combat rule simplification to de-emphasize D&D's focus on tactical combat.