New answers tagged retro-clones
The Dungeon Crawl Classics game seems to fit the above criteria, although it cuts off at level 10 as opposed to the RC's 36. It uses the RC's classes, including that of Dwarf/Elf/Halfling as self-contained classes as opposed to having racial mechanics. Ascending AC, attack bonuses, saves, all check. Fort, Reflex, Will saves - check.
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