Here is the full list of all 24 A.R.E.S.: Extinction Agenda achievements.
Achieve Synthesis Soldier rank 'SS'
In Hard Mode, defeat all the bosses using only the Zytron Blaster
Achieve Synthesis Soldier rank 'S'
Achieve Synthesis Soldier rank 'A'
Finish all of the stages without dying
Perfect the Prime Guardian boss fight
Perfect the Sentinel boss fight
Perfect the Carrion boss fight
Collect 1000 units of each material type
Collect all the Data cubes
Perfect the Goliath boss fight
Finish all of the stages without using a single repair kit
Destroy 5 or more enemies, at once with Valkyl's Zypher Cannon
Destroy 1000 enemies
Stun 10 enemies with the EMP grenade
Destroy 20 enemies, using your Grenade Attack
Destroy 10 enemies, using your Dash Attack
Watch all the cut-scenes without skipping
Maximize your attack combo
Finish the game once
Upgrade one of your weapons to its maximum level
Finish all of the in-game tutorials
Trick a Bomber to hit and destroy a Zytron Walker (LA)
Discover and use your first repair machine