Here is the full list of all 18 Everdell achievements.
Claim 4 or more Events in a single game.
End a game 15+ cards in your city.
Pair a husband and wife.
Send a worker to an open destination owned by another player 3 or more times in a single game
Journey three times in a single game.
Have 5 or more occupied constructions in a single game.
End a game with 2 Critters in your Dungeon.
Score 5 bonus points in one game with Ever Tree.
Complete the Tutorial.
Compete every normal Challenge.
Complete every hard Challenge.
Win an online game.
Win 25 online games.
Score 50 victory points in a single game.
Score 75 victory points in a single game.
End a game with two workers in your Monastery.
Score 3 victory points in a single game with Shepard.
Take 5 or more turns in a row.