Here is the full list of all 40 METALLIC CHILD achievements.
Be graded a D for battle 100 times.
Accomplish 100 triple kills.
Open Daviny's box 20 times.
Repair Schrodinger 20 times.
Accomplish 30 fantastic kills.
Equip a drone 100 times during battle.
Help retrieve Sly's weapons 20 times.
Go on camera 20 times, for Miamo's live stream.
Install 200 bugged and viral Cores.
Perform 200 Chain-skill attacks.
Clear all Virtual Missions.
Install 150 Super-cores.
Change weapons 100 times during battle.
Clear Terminal Creed.
Perform 200 Take-downs.
Defeat 3000 enemies.
Defeat the Metallic Child, Magna.
Defeat all Metallic Childs.
Defeat the Metallic Child, Gigantic.
Collect all Recor-Ds.
Rescue 20 survivors.
Defeat the Metallic Child, Lighton.
Defeat the Metallic Child, Flyer.
Defeat the Metallic Child, Spyden.
Deal 600 damage or more to an enemy in a single hit.
Defeat the Metallic Child, Shutty.
Defeat the Metallic Child, Fira.
Collect all Fan-art.
Accomplish = double kills.
Accomplish 30 combos.
Defeat the Metallic Child, Controd.
Experience a defeat in battle.
Be graded an S for battle 100 times.
Install 150 Mini-cores.
Defeat the Metallic Child, Graver.
Defeat the Metallic Child, Icela.
Defeat the Metallic Child, Faceless.
Visit the various facilities of Life Stream.
Help deliver Trevon's virus case 20 times.
Defeat 20 of Catherine's modified robots.