Here is the full list of all 19 Courage for a Kiss achievements.
Anything that could go wrong, went wrong
Finished Amelia's route
Finished all four routes!
Started Amelia's route
Sided with Jennifer
Finished Stella's route
Started Stella's route
Finished Jennifer's route
Started Jennifer's route
A gun appeared on stage!
Well... You messed up
Finished Evelyn's route
Finished the game for the first time!
Started Evelyn's route
Finished Act Two
There's nothing we could do about it
Finished Act One
Sided with Evelyn
Started the game