The Leviathans Add-on for Stellaris has 12 achievements.
Take a trophy from a stellar being
Hatch the egg
Destroy a wraith
Uncover the secrets of an ancient fortress
Destroy an enclave
Defeat a horrifying invader
Restore an ancient warship
Recruit a scientist from the Curators
Purchase a rare resource from the Traders
Support the Artisan Troupe for 10 years
Birth a new universe
Lead the non-aligned powers to victory against an awakened empire