Here is the full list of all 13 Feudal Alloy achievements.
Hit a scarecrow 10 times.
Find all pieces of the map.
Open all the chests.
Find all the lockets.
Activate all the modules.
Put on a complete equipment set.
Spend 20000 coins.
Hoard 15000 coins.
Finish the game.
Defeat the first boss.
Defeat the final boss.
Use all the data cartridges.
Activate all the teleporters.