Here is the full list of all 31 A.R.E.S. Extinction Agenda EX achievements.
Perfect all the boss fights in Hardcore Mode
Achieve character level '6'
Perfect the Minos Cannon boss fight
Achieve character level '5'
Finish every chapter without using repair
Perfect the boss fight in chapter 5 with Tarus
Finish the game with Ares
Perfect the boss fight in chapter 5 with Ares
Perfect the Prime Guardian boss fight
Perfect the Zypher Pod boss fight
Perfect the Carrion boss fight
Collect all the Data cubes
Perfect the Sentinel boss fight
Finish the game with Tarus
Upgrade every weapon and ability to its maximum level
Beat the boss in chapter 5 with Ares
Find the drone repair bay
Beat Zypher Pod with Ares
Beat Carrion with both Ares and Tarus
Destroy 5 or more enemies, at once with Solar Strike
Collect all Upgrade chips
Acquire all abilities and weapons
Achieve character level '4'
Beat the boss in chapter 5 with Tarus
Get stronger!
Perfect the Goliath boss fight
Upgrade one of your weapons to its maximum level
Break the enemy’s shield with Plasma Shock or Lockdown
Achieve 99 attack combo
Beat Zytron Walker, Zytron Trooper and Zytron Booster with Tarus
Beat Goliath