Here is the full list of all 30 A.R.E.S. Extinction Agenda EX achievements worth 400 gamerscore.
Perfect the boss fight in chapter 5 with Tarus
Finish the game with Tarus
Beat the boss in chapter 5 with Tarus
Collect all the Data cubes
Get stronger!
Beat Zytron Walker, Zytron Trooper and Zytron Booster with Tarus
Beat Carrion with both Ares and Tarus
Perfect the Minos Cannon boss fight
Achieve character level '6'
Achieve character level '5'
Finish every chapter without using repair
Destroy 5 or more enemies, at once with Solar Strike
Perfect the Prime Guardian boss fight
Perfect the boss fight in chapter 5 with Ares
Perfect the Sentinel boss fight
Perfect the Zypher Pod boss fight
Upgrade every weapon and ability to its maximum level
Finish the game with Ares
Achieve character level '4'
Perfect the Carrion boss fight
Perfect the Goliath boss fight
Collect all Upgrade chips
Acquire all abilities and weapons
Beat the boss in chapter 5 with Ares
Achieve 99 attack combo
Upgrade one of your weapons to its maximum level
Find the drone repair bay
Break the enemy’s shield with Plasma Shock or Lockdown
Beat Zypher Pod with Ares
Beat Goliath