Here is the full list of all 28 Loadout achievements.
Get 50 kills against players.
Heal and/or Buff 50 teammates.
Smash 3 people with the hammer in Jackhammer.
Capture 10 points in Blitz.
Kill an enemy who has a damage boost in Annihilation.
Complete a match of any game type.
Watch the credits, feel the love.
Create your first gun.
Reach Level 5.
Reach Level 10.
Reach Level 15.
Reach Level 20.
Reach Level 30.
Reach Level 40.
Unlock every piece of equipment in the tech tree.
Unlock every launcher part in the tech tree.
Unlock every rifle part in the tech tree.
Unlock every beam part in the tech tree.
Unlock every pulse part in the tech tree.
Get 1500 kills against players.
Win 25 games.
Win 100 games.
Get 500 headshots.
Collect 50 enemy vials in Death Snatch.
Use the hammer to destroy the enemy dropship in Annihilation.
Play in matches for 10 hours.
Play in matches for 100 hours.
Upgrade any single item to tier 2.