Oddworld: Stranger's Wrath HD

Story-related. Cannot be missed.
After leaving Last Legs, you will come to two platforms in the water guarding a large door to the dam. Each platform has a switch that deactivates each lock on the door. Take out the Wolvarks on each platform to reach the switches at the end of each one. Watch out for the gun turrets attached to the dam as well.

Once you have unlocked the doors, get back to your boat and head inside. Once you pass through the doorway the trophy will unlock.