Here is the full list of all 12 Dead End City achievements worth 1,000 gamerscore.
Build up the score multiplier to x9.
Clear the Wasteland in Arcade mode on any difficulty.
Clear the Railway in Arcade mode on any difficulty.
Clear the Mountains in Arcade mode on any difficulty.
Clear the Desert in Arcade mode on any difficulty.
Clear Arcade mode on Normal difficulty
Beat any boss without taking any damage.
Score 1,000,000 points in Arcade Mode with any car.
Kill 1000 enemies.
Kill 5000 enemies.
Collect 100 gold medals.
Collect 1000 gold medals.