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