In Bad Day L.A., players are thrust behind the shopping cart of a homeless man turned city-saving crusader. Anthony Williams survives in his cocoon of destitution and isolation in L.A. until it all suddenly goes downhill and Los Angeles comes under attack from zombies, terrorists, earthquakes and other untold disasters. Using only his street smarts and the environment to stay alive, he must save the very city he loathes and its citizens whom he detests, and, in the end, escape what has become a very bad day in L.A.

The game boasts graphical design by the art team Kozyndan, and includes 10 levels based on real-world Los Angeles neighborhoods. To fight through this battered Los Angeles, players are armed with an eclectic mix of everyday armaments, from the mundane firearm to the more improvisational spray paint can flamethrower.