Here is the full list of all 50 Fatal Inertia achievements worth 1,000 gamerscore.
Get first place in the Nightfall Series II.
Get first place in the Armageddon Series II.
Win 10 races with a Titan class racecraft.
Win 50 events on Xbox LIVE.
Finish a Time Trial on any course in 36 seconds or less.
Finish a race in all of the tracks in every environments (51 total).
Get 40 points in every series in your career.
Win 200 or more events.
Win 20 Knockout events.
Win a single event on Xbox LIVE.
Accelerate your racecraft to 900 km/h (563 mph) (excluding during Time Dilation)
Get first place in the Throttle Series III.
You won a splitscreen Quick Race against a human pilot.
Get first place in the World Championship Series.
Get first place in the Prodigy Series.
Win 20 Velocity events.
You won 10 races with a Mercury class racecraft.
Win 100 or more events.
Get first place in the Hurricane Series.
Win 20 Magnet Mayhem events.
Finish a Time Trial on any course in 50 seconds or less.
Destroy all 7 opponents in a single event.
Lap all 7 opponents in one event.
Score 1000 or more combat points in a single event.
Destroy 3 opponents in a single event.
Score 600 or more combat points in a single event.
Win a Velocity race without using any weapons.
Get first place in the Scramble Series.
Get first place in the Cardinal Series III.
Win 10 races with an Aurora class racecraft.
Accelerate your racecraft to 750 km/h (469 mph) (excluding during Time Dilation)
Get first place in the Armageddon Series.
Win 50 or more events.
Get first place in the Demolition Series.
Destroy an opponent during an event.
You knocked off at least 10 magnets from your craft using a single brake-boost.
Get first place in the Throttle Series II.
Using a brake-boost, knock an attached rocket off your craft.
You got first place in the Nightfall Series.
Get first place in the Cardinal Series II.
You won 10 races with a Phoenix class racecraft.
You got first place in the Throttle Series.
You won 20 Combat Race events.
You got first place in the Skirmish Series.
You caught all 7 opponents in one Smoke Bomb.
You got first place in the Cardinal Series.
You had a perfectly timed brake-boost at the start of a race.
You tethered two opponents together with a single Cable.
You tethered an opponent to the ground with a Cable.
You removed attached weapons by doing a barrel-roll.