Here is the full list of all 45 FlatOut Ultimate Carnage achievements worth 1,000 gamerscore.
Drive a total distance of 1001 miles.
Jump at least 10m high with your car on a Carnage or normal Race.
Frustration! You know all about it, but still you persist, never giving up.
Burn nitro continuously for at least 10 seconds in a normal race.
Be the best wrecker in 50 races.
Win 15 Derbies.
Get the fastest lap of the race in 50 races.
Get 30 Crash-Out crash bonuses.
Now that's a start! You've completed your first cup in FlatOut Mode.
Complete your first class in the FlatOut Mode.
Get 1 million points in the Carnage Mode.
Complete Carnage Mode.
Complete Carnage Mode with all gold.
Complete FlatOut Mode.
Complete FlatOut Mode with all gold in all cups and events.
Complete all the Deathmatch Derbies in Carnage Mode with all gold.
Complete all the Stunts in Carnage Mode with all gold.
Complete all the Stunts in Carnage Mode with silver or better.
Complete all Beat the Bomb’s in Carnage Mode with all gold.
Complete all derbies in FlatOut Mode with all gold.
Complete all Time Trials in FlatOut Mode with all gold.
Get 100 Slam crash bonuses.
Win a Head On or normal race with the Truck.
Win all Bonus Race Single Events with the Flatmobile.
Win Derby class in Flatout Mode (all cups gold) with an unupgraded Chili.
Own at least 6 vehicles at the same time.
Sell 10 cars.
Own a fully upgraded Street class car in FlatOut Mode.
Wreck an opponent's car in a Carnage or normal Race.
Achieve all 4 “Top Driver” awards in one race and win the race.
Get 5 Slams in one race.
Get 10 Crash-Out bonuses
Host 10 online matches.
Win 10 online Races.
Win 25 ranked online Races.
Win 10 online ragdoll Stunts.
Win 30 ranked online ragdoll Stunts.
Win 10 online Derbies.
Win 20 ranked online Derbies.
Wreck 10 opponents in online races.
Wreck 3 or more opponents in the same online race (normal or Head-On).
Complete an online Race without crashing into anyone, and without ragdolling at all.
Get a frag streak of 5 or more in an online Deathmatch Derby.