Here is the full list of all 38 Gearshifters achievements.
All other trophies unlocked.
Destroy all Elite vehicles.
Survive any stage without taking damage.
Defeat all factions.
Deliver 10 different cargoes.
Destroy the Emissary.
Game completed (Any mode).
Complete a Citadel stage.
Unlock all driving skills.
Purchase all upgrades.
Complete a Northern Expanse stage.
Destroy the Spearhunter.
Destroy the Marauder.
Use 15 different boosts.
Complete a Sentry Ranges stage.
Destroy the Suncopter.
Purchase 10 charge abilities.
Unlock 5 liveries.
Destroy the Wrecker.
Complete a Dark Haven stage.
Purchase 10 weapons.
Complete a Shadow Quarter stage.
Complete an Ochre Wastes stage.
Destroy an enemy with a Reverse attack.
Destroy 50 enemy vehicles with melee attacks.
Acquire 20,000 currency.
Destroy an Elite vehicle.
Destroy the Thunderer.
Destroy the Juggernaut.
Destroy an enemy with a Powerslide attack.
Complete a South Uplands stage.
Destroy the Sawdozer.
Defeat a faction.
Equip a secondary weapon.
Complete a Frontier Province stage.
Equip your car with an upgrade.
Destroy the Combustor.
Complete a Primary Sector stage.