Here is the full list of all 45 Scars Above achievements.
Scanned all hostile creatures.
Kept an enemy within the Gravity Trap for its whole duration.
Completed the game.
Defeated the Omega and the Custodian.
Discovered Naya's fate.
Unlocked all abilities.
Activated all pillars.
Crafted a weapon upgrade for all weapons.
Crafted all weapons.
Crafted all gadgets.
Defeated the Neuro-parasite.
Defeated the Feliform Cadaver.
Scanned all available unique natural resources.
Unlocked a tier 4 ability.
Learned of Kate's special status.
Solved all puzzles.
Learned of the mysterious code hidden in genes.
Defeated the Construct.
Ignited multiple enemies with a single Flammable Liquid charge.
Found the crashed remains of the Hermes.
Killed an enemy while it was affected by the Holo-lure.
Crafted all consumables.
Activated 5 pillars.
Found Mr. Jefferson.
Reached the Grassy Plains.
Discovered Robinsons' transformation into the Alluvial King and had to kill him.
Used the shield to deflect incoming damage that would have killed you.
Crafted a weapon upgrade.
Solved the Alien Console puzzle.
Used the pulse scan to reveal an enemy weak point.
Killed an enemy while it was in the frozen state.
Crafted the first gadget.
Defeated the Alpha.
Investigated the area around Richard's backpack and figured out where he went.
Crafted the first consumable.
Used the Mobile Printing Unit to craft the Thermic Charger.
Unlocked the first ability.
Activated your first pillar.
Scanned a Knowledge Cube.
Caused an elemental reaction.
Scanned first natural resource.
Scanned the first hostile creature.
Weathered the mysterious storm.
Discovered the Metahedron vista.
VERA assembled.