Here is the full list of all 15 Apex Construct achievements.
Alert the crabs in Hello World
Get to the safe house
Crash Fathr's Head to the ground
Pay Mothr a return visit
Power up the cloaking device
Defeat the Bear Behemoth in the caves
Gain access to the locked room in the safe house
Gain the highest security access level
Defeat the Bear Behemoth in the CARF Teleportation lab
Electrify water & damage an enemy
Hurt/kill an enemy with a Radiance Mine
Spend RP at a Vending Machine
Find all collectibles
Find all lore texts
Find all secrets