For over 20 years now I have ran a homebrewed gaming system based off of the Palladium Rifts books. While the combat system is in tact, much of the rest of it was altered. ( I have GM'd D&D and Rifts for a long few decades. Currently run a D&D campaign on Wednesdays. ) With many players help over the years, this has molded into a successful game for me and my players. With 30 classes and 10 races to choose from, the heroes are endless. This still uses the D20 system for combat, but also uses percentile rolls as in the original Rifts context. The worlds and campaigns are set up by my creation. With an open world like construction. NPC's, storylines, encounters, are all set up through Roll20 by me. ( Wish Roll20 would support a better Palladium character sheet .) I even wrote a short novel about a character in one of my worlds when I still wrote. We use Discord and Roll20 by the way. As a GM there are events that happen throughout the campaign. Either around the heroes or outside of the heroes. These different pathways can lead to different endings for the campaign. Or can help or hinder the heroes journey along the way. ( One campaign had the heroes accidently kill an entire city from a poisonous outbreak. Causing them to have to redeem themselves for that act .) Also as a GM I always give each player a place to shine. Most recently, a Lizardman Time Mage brought down a wicked demon by sacrificing his body to cast a spell. As a last ditch effort, he killed it. Anyway, if you are looking for a new gaming system to try out in fantasy worlds, come join the fun. Looking for 2-3 players at the moment. For more, my Discord chat is Nexsis476553