The Dawn of the Rise of the Fallen Machines Add-on for Sunset Overdrive has 8 achievements worth 225 gamerscore.
Defeat Brandon. Like, for real.
Reroute the power inside the factory in the weirdest way possible.
Put on a robot costume and collect the kill codes.
Work with Buck and Sam to create a new weapon.
Weapons design is a tough business.
Find Fiona and Lou, then help them escape by fixing Snackwrap.
Ride a cargo container into the factory.
Survive Chaos Squad in the Robot Factory with at least 2300 Chaos.