Full list of all 44 Maneater achievements. It takes around 8-10 hours to unlock all of the achievements in the base game on Windows.
The base game contains 32 achievements, and there is 1 DLC pack containing 12 achievements.
Complete all objectives in The Gulf
Reach 100% objective completion in all regions
Get revenge
Acquire 100% of available evolutions
Kill The Apex Predator in The Gulf
Destroy all Apex Predators
Find all landmarks
Find all license plates
Find all nutrient caches
Reach Infamy Level 10
Complete all objectives in Dead Horse Lake
Complete all objectives in Caviar Key
Kill The Apex Predator in Caviar Key
Complete all objectives in Prosperity Sands
Kill The Apex Predator in Prosperity Sands
Reached Mega Growth
Complete all objectives in Golden Shores
Acquire 50% of available evolutions
Complete all objectives in Sapphire Bay
Reached Elder Growth
Survive Again
Kill The Apex Predator in Sapphire Bay
Complete all objectives in Fawtick Bayou
Kill The Apex Predator in Fawtick Bayou
Kill The Apex Predator in Golden Shores
Reached Adult Growth
Kill The Apex Predator in Dead Horse Lake
Reach Infamy Level 1
Reach Teen Growth
Evolve for the first time
Survive Birth
Complete the tutorial
Complete all objectives in the Plover Island Complex
Complete all available objective in Truth Quest
Kill the Atomic Leviathan
Complete 100% of the Time Trials
Defeat Adm. Barbara Terranova
Acquire 100% of the Atomic Evolution set
Kill the Bone Sperm Whale
Reach level 40
Kill the Shadow Orca
Kill the Electric Great White
Eat all the Questers
Reach the Plover Island Complex