Cogent Roleplay Core Rule Book

From the introduction:

Welcome to Cogent Roleplay - a Tabletop Pen and Paper Role-playing game that is easy to learn, flexible, comprehensive, sophisticated and of course loads of fun. The Cogent Roleplaying System aims to provide you with the tools you need to experience adventures as any character you can imagine, such as a great hero, scoundrel, villain, thief, rogue or any other. Your stories will unfold in all kinds of worlds and settings, such as classic medieval fantasy, science fiction, space opera, zombie apocalypse, steampunk, superhero - or something of your own unique creation. Have fun, be fearless and create your own stories worthy of the greatest myths, legends and chronicles!