The setup to this twitchy shoot-fest is that an Angel (Harry) and a Demoness (Judy) have to team-up in order to save humanity from the Four Horseman of the Apocalypse. The same "one hit you're dead" mechanics from Hotline Miami apply here, so when you and your co-op buddy are clearing rooms of bad guys you'll have to be quick to get them before they get you. Each player will have access to some special abilities (like teleporting across a room or hurling scenery at enemies), and you can also revive a downed teammate, but it sounds like the action is fast and furious so you'll have to choose your moments carefully.