RedHack

Publisher's blurb: RedHack is a d20 system that blends modern character customization and OSR gameplay philosophies. Character creation is classless, relying on a limited number of highly impactful options. As PCs level, they will become more skilled and efficient, but HP does not significantly increase. There are no insignificant threats or monsters. Surviving to level 10 is an achievement. Balancing resources (such as luck, consumables, and HP) and making smart decisions will give PCs the edge they need. RedHack is a concise, complete package that contains Player Rules, a GM Guide, a Bestiary of 24 classic foes, and a sample adventure. It’s also fairly easy to run other system’s adventures with on-the-fly conversions.