it's an apocalyptic future where blood-hungry monsters run rampant, and in these dire situations you have to do whatever it takes in order to survive, even if it means going down one of the most physically and emotionally taxing paths out there: the fast food industry.

in "overtime.", you're put to work as a delivery boy for a multi-million dollar fast food chain and it's your job to fend off the horde, upgrade your arsenal, and power your way through 5 levels and 30 stages to hopefully earn enough money to escape back to normal civilization, or be kicked back into the streets to rot. and you don't want that, so GET TO WORK.