Promised Sands RPG
A fantasy RPG set in an original fantasy setting called T'nah: a magical¸ post-apocalyptic¸ vaguely middle-eastern desert environment. It uses a percentile skill-based system (the ""Trinary System"")¸ where you roll 3d10¸ the first two dice are percentile roll that determines success or failure and the third d10 is the Effect Die which determines degree of success. The 394-page core book includes extensive world detail¸ two magic systems (Ido and Qai)¸ and a selection of monsters. - A description from https://darkshire.net/jhkim/rpg/encyclopedia/ with kind permission of John H. Kim"