Single player quake with a Rogue Legacy progression system. You play the regular quake single player levels. You start out very weak. You get money by killing monsters, finishing level with many kills, and finding secrets. When you die, you spawn back at start and can buy upgrades with your money. When you start playing again you lose your remaining money (so spend it all). Save-loading remembers your progress. Save-loading to avoid death is discouraged. If you want to play other levels use "changelevel mylevel" ("map mylevel" deletes your progress). I play by selecting difficulty, then pressing 8 to run through all quake levels in randomized order, die, buy upgrades, and press 8 again. Repeating until I become powerful enough to finish all 32 levels without dying.
First 10 minutes of playing shuffled levels on hard. Levels at 4x speed.