I've been on a bit of a kick lately, finding and downloading all the free rulebooks I can find.
My top 3 so far have been this. Again, they're all free to download.
1. Mini-Six Bare Bones Edition. This is Star Wars D6, but simplified to be only 30 pages, nerfed a bit where it really needed it, and yet also has two sets of rules for easier/faster combat or traditional D6 combat, and two different ways to track damage. Also, this set of rules can be used for other settings like Fantasy, or Steampunk, or any Sci-Fi universe you want to play in, but the draw for me was Star Wars.
2. Basic Fantasy RPG. I've bought and read D&D books before, but I can't say I like the rules from any of them that much. Even the free set of starter rules from their website, D&D basic Rules 2018.
However, this game looks like it would be easy to play. It also impressed me with now much other stuff it packed into the book, like minions and castle siege rules. None of my other games have that, and I own a few.
3. Pocket Fantasy RPG. Now this is taking the idea of reducing a game to is most basic level to an insane degree, in this case to just 4 pages long. All dice rolls are just a 1D6. Characters only have 2 stat numbers, their weapon skill and their hit points, determined by their class. They also get a few race and class abilities. Re-rolls play a big part of the rules as well. It may be just enough to play a game, but good games are fun because of the story made by the players and GM, not by the math and lots of rules you have to remember.
For me I think Mini-Six Bare Bones Editiion is my favorite right now. It rekindled my love for Star Wars RPGs, its compatible with all their old books, but the rules just make a lot more sense.
Which games do you like that are free?