Here is the full list of all 26 Warborn achievements worth 1,000 gamerscore.
Complete Luella's first mission.
Complete Luella's chapter.
Obtain S Rank for Luella's finale mission and every mission in her chapter.
Complete Vincent's first mission.
Complete Vincent's chapter.
Obtain S Rank for Vincent's finale mission and every mission in his chapter.
Complete Aurielle's first mission.
Complete Aurielle's chapter.
Obtain S Rank for Aurielle's finale mission and every mission in her chapter.
Complete Izol's first mission.
Complete Izol's chapter.
Obtain S Rank for Izol's finale mission and every mission in his chapter.
Complete all finale missions.
Obtain S Rank for every campaign mission.
Make a custom multiplayer map.
Win an online multiplayer quick play match.
Win an offline skirmish match.
Complete a campaign mission without losing a single Variable Armour.
Use a Commander Power for the first time.
Call in a commander's personal Variable Armour for the first time.
Win an offline skirmish match once with every commander.
Hit three or more targets with a single attack.
Deploy a Variable Armour to an Outpost for the first time.
Destroy an enemy with a Prospect proximity mine.
Repair a friendly Variable Armour back to full HP.
Complete a campaign mission with 15 or more Variable Armours deployed.