Brogue (2009)

No class-unlock screen asks you to earn the interesting build first. What you find in the dungeon, and where you spend its scarce enchantments, determines the character you become. A new expedition starts that process again instead of inheriting a trained adventurer. Use Community Edition, the continuation recommended by the original creator. It is particularly appealing if you want a fixed starting baseline and equipment-led improvisation, with patient learning replacing a catalogue of permanent perks.