Here is the full list of all 16 Age of Grit achievements.
Retrieve a pet chicken for a little girl.
Save 10,000 gold bits.
Have 50,000 gold bits.
Defeat a total of 10 enemies in combat.
Defeat a total of 25 enemies in combat.
Defeat a total of 50 enemies in combat.
Defeat 5 townsfolk in a sky duel.
Break Aldous Helmholtz out of prison.
Defeat 10 vulture ships.
Deliver a load from Sandra Port all the way to Ames Peak.
Help Maggie MacKenna cut through some red tape.
Hunt down and kill Carl "The Goose" Howzer.
Unite the four Buckley boys.
Acquire 10 karma tokens.
Acquire 10 infamy tokens.
Beat the game!