Modern 20 (d20)
An electronically-published standalone system based on D20 Modern. The variant aims to make the base system smoother and faster-playing. It replaces the Basic¸ Advanced and Prestige Classes with six Core Classes. The skill list has been changed¸ along with new rules for backgrounds¸ occupations¸ and hobbies. Wealth is used¸ but is not used to roll wealth checks. Critical hits are replaced by a hit location system that modifies damage. - A description from https://darkshire.net/jhkim/rpg/encyclopedia/ with kind permission of John H. Kim"