Exemplars & Eidolons released by Sine Nomine (Free OSR Game)

While it seems to be fully playable game, it seems to also be an example of how to make an OSR game

Exemplars & Eidolons is a fully-playable OSR mini-game of high-powered legendary adventurers. But what I really wrote it to be is a simple layout template for other people who'd like to echo the old "Little Brown Books" style of old-school game pamphlets. As the principles of page design are a lot easier to explain with actual game text, I wrote the game so I could have something to lay out for you.
In this download, you'll get the game itself in two versions- one with no Commentary layer for the convenience of people using certain tablet readers, and one with a layer you can turn on via Adobe Reader to see the page design tricks and principles I used to put the pamphlet together. I've also included InDesign source files for the game, and an .IDML InDesign markup language file that should be readable by Scribus. You are encouraged to loot the styles and page objects for your own creations, whether free or commercial.
The art used in the game is also included, and was drawn from the Spears of the Dawn Art Pack and the Scarlet Heroes Art Pack, both of which are free for commercial use and available here on DTRPG.