Here is the full list of all 42 Amber's Magic Shop achievements.
Complete main plot quest with light alignment
Finish the game in Visual Novel Mode
See Vin and Amber in a precarious situation
Unlock Lair Light Plus Ending
Unlock Cosmina Light Plus Ending
Pass the alchemy test at first try
Unlock Daniel Light Plus Ending
Unlock Daniel Light Ending
Unlock Daniel Dark Ending
Unlock Daniel Dark Plus Ending
Unlock Bernard Light Plus Ending
Unlock Bernard Light Ending
Unlock Bernard Dark Ending
Unlock Bernard Dark Plus Ending
Unlock Lair Light Ending
Unlock Lair Dark Ending
Unlock Lair Dark Plus Ending
Unlock Ruby Light Plus Ending
Unlock Ruby Light Ending
Unlock Ruby Dark Ending
Unlock Ruby Dark Plus Ending
Unlock Lynn Light Plus Ending
Unlock Lynn Light Ending
Unlock Lynn Dark Ending
Unlock Lynn Dark Plus Ending
Unlock Cosmina Light Ending
Unlock Cosmina Dark Ending
Unlock Cosmina Dark Plus Ending
Complete main plot quest with dark alignment
Build all the shop upgrades
Unlock all Daniel's endings
Unlock all Ruby's endings
Unlock all Lair's endings
Unlock all Bernard's endings
Unlock all Cosmina's endings
Unlock all Lynn's endings
Unlock all main endings
Unlock all Manuel's mini route endings
Find how to trigger Manuel's bonus route
Fail to pass the alchemy test after 3 times!
Fail the main plot quest with dark alignment
Fail the main plot quest with light alignment