Monster Gate

Monster Gate is a dungeon-RPG, like Chunsoft's Fushigi no Dungeon, which is an adaptation of the Arcade Monster Gate game on the Gameboy Advance. The game features a selection of procedurally generated dungeons, each of which has its own size, depth, selection of monsters and various special rules/features. You start out with base stats and quickly gain experience levels for killing monsters (which are invisible, and which you can judge only by looking at your max HP). It doesn't take many kills before you stop gaining exp levels. To help yourself in the dungeon, you can bring up to 10 single-use cards (more can be found in the dungeon), which act as spells.