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