Deadlands - Hell on Earth
A post-apocalyptic fantasy-horror RPG¸ set in the year 2094 in a possible future of the Deadlands universe. In 2081¸ the Reckoners (masters of the evil manitou spirits) break through into the world. It uses a variant of the Deadlands system. New character types are psionic ""Sykers""¸ mutant ""Doomsayers""¸ magic warrior ""Templars""¸ and mad-scientist ""Junkers"". - A description from https://darkshire.net/jhkim/rpg/encyclopedia/ with kind permission of John H. Kim"
Besides all the normal stuff on making characters and blowing stuff up¸ there's also juicy information on Doomsayers¸ junkers¸ sykers¸ Templars¸ and-of course-the Harrowed.