The twenty-sided Die (d20) is the most popular and versatile RPG dice used for almost all rolls in these games. This includes calculating attacks, hit points & damage dealt with enemies during battle scenes by rolling on character sheets. While 14-16sided D&D / Pathfinder dice are also common among gamers; however they get used less frequently than the d20s because of their higher numbers which can slow down gameplay when it gets too complicated or confusing to stick with one type per game session if possible.