Rip and tear until the timer stops
The demons will remember you. Briefly.
Fifteen minutes. Not one step back.
Move. Your arsenal fires itself. Shred the horde, hoover up souls and pick an upgrade every level.
Survive 15:00. Bosses arrive at 5:00 and 10:00. Barrels go boom. Standing still is how heroes become floor decals.
Max a weapon, own its partner passive, then crack a chest from a boss or elite.