So I went to sleep while looking at Reaper Mini's free-to-play RPG which is just a watered down DnD 3.5 game (Found here if interested: it only takes players to level 3) but as I was drifting off to sleep I actually dreamed of a Truly universal role-play system, or TURS.

The idea behind it was that you had very large categories of things, and then everything was a subcategory of it. So like for races/ancestries, there was, like, the 'humanoid' group. And there were certain things that every humanoid could get, but you also had sub-groups like Orc, Human, Elf, Dwarf, or Gnome.

Then there was the 'Furry' group, and subcategories like Mamal, Feathery, Scaly, etc. Basically there was no, say, Kobold Race. Instead you could say "I wanna be a humanoid dragon' and that would be fine, but you got roughly the same power level of abilities as, say, a human or a Dwarf, and you would be under the Scaly category (or Feathery if you wanted to make a feather dragon . . . whatever)

An Undead group with subcategories like Skeleton, Zombie, Vampire, specter, etc.

Classes worked similarly, where there were maybe about four classes, but each had their own subclass.
So for Warrior, you could subclass into Knight, Sellsword, Samurai, etc.
For Striker you could have Rogue, Monk, Ranger, etc
For Spellcaster you could pick Wizard, Druid, Cleric, Psychic, etc.
And then Battlecaster, which would have some magic, and some ability to fight, but not as good as either, like Magus, Bard, Warlock, etc.

And then as you leveled up, you could choose new abilities based on your class. For example, Warriors might be able to pick up 'minor magic' which would let them cast a few spells (less than a batttlecaster or a spellcaster)

Anyway, I thought it was a fun idea. Let me know what you think.