Gateway
GATEWAY: The Free d20 RPG!Welcome adventurer! GATEWAY RPG is a Free¸ rules-lite¸ easy to learn¸ fast-paced¸ and universal d20 Roleplaying Game system that is perfect for introducing new players to the hobby of tabletop role-playing games. This system allows for any theme or setting¸ from Fantasy to Cyberpunk¸ from Horror to Noir¸ or whatever your imagination can create.
GATEWAY's simple rules are based on similar mechanics from the 5th Edition of "The most popular roleplaying game in the world". It is easy for new players to learn the rules¸ go on an adventure in a short period of time¸ and is the perfect "gateway" to other tabletop RPGs. The open genre even provides a great format for "One Shot" adventures with your fellow veteran players and Game Masters.
Alternatively¸ longer term campaigns are possible by using Gateway's "Advanced Play Variant" or by simply incorporating rules from other d20 systems such as D&D¸ Pathfinder¸ Star Wars d20¸ Call of Cthulhu d20¸ etc. You can even move your adventure over completely to those rulesets.
This rules system includes the following: