Here is the full list of all 12 Water Planet achievements.
Take Whalie to Water Planet.
Encounters with the cybernetic kind.
Discover a submerged culture.
Find an ancient creature.
Learn from the wise.
Follow the light.
Unless they figure out how to open doors.
Reach new depths.
Unlock ancient future technology.
Aqua finds its friends.
The heart of everything.
Ascend Airfall Monument