Monsters Dungeon Battle

Monsters Dungeon Battle sends you into an abandoned dungeon against the monsters that have taken it over, and builds its progression on two separate tracks. You upgrade your stats in the usual way, but you also collect classes — Wizard, Archer and others — which is a different kind of growth: rather than becoming better at what you already do, you gain access to ways of fighting you did not have. That makes an encounter you could not previously win something you might return to with a different approach. Defeating them all and saving the world is the stated goal, and the class collecting is what keeps the route toward it varied.