Here is the full list of all 12 Pixelscape: Oceans achievements.
Save your first Pixelscape with at least 50 objects
Play Pixelscape Oceans for an hour straight
Play Pixelscape Oceans for 534 minutes total.
Save a pixelscape in all 4 unique light settings.
Upload a complete pixelscape to the Steam Workshop
Place 20,000 objects total.
Save a Pixelscape with at least 2500 objects.
Save a populated Pixelscape in all 12 available slots.
Save a Pixelscape with every available living creature.
Unlock every other achievement.
Create and save a complete Pixelscape over the included example.
Witness a rare turtle event. No fish invited!