Here is the full list of all 41 Gear of Glass: Eolarn's war achievements.
Make a run from one route to another
Get the only ending of the Family's route
Betray one of the characters
Use the abilities of the stats points
Get all the endings
Get any ending of the Alessia's route
Get any ending of the Master's route
Get any ending of the Christian's route
Get any ending of the Jeremy's route
Get any ending of the Dirk's route
Get any ending of the Killian's route
Get any ending of the Darius's route
Get any ending of the Estelle's route
Get any ending of the Erna's route
Get all the endings of Alessia's route
Get all the endings of Master's route
Get all the endings of Christian's route
Get all the endings of Jeremy's route
Get all the endings of Dirk's route
Get all the endings of Killian's route
Get all the endings of Darius's route
Get all the endings of Estelle's route
Get all the endings of Erna's route
Have an affair with Alessia
Have an affair with Erna
Have an affair with Estelle
Have a secret affair
Have an affair with Darius
Have an affair with Dirk
Have an affair with Killian
Have an affair with Jeremy
Have an affair with Marlon
Complete the game without having an affair
Kill the Master
Convince the character
Win a mini-game in Jeremy's route
Lose in a mini-game in Jeremy's route
Win in a mini-game in the Alessia's route
Lose in a mini-game in the Alessia's route
Decrypt the password in Jeremy's route
Fail to decrypt the password in Jeremy's route