Full list of all 25 Megaquarium achievements.
The base game contains 15 achievements, and there are 4 DLC packs containing 10 achievements.
In Sandbox mode, reach rank 12 using the Standard preset on normal difficulty or higher.
In Sandbox mode, reach rank 12 using the Limited Supply preset on normal difficulty or higher.
In Sandbox mode, unlock every animal using the Quick Start preset on hard difficulty or higher.