Here is the full list of all 25 Gods of the Twilight achievements.
Complete Althea Part 1
Complete Farkas Part 1
Complete Althea Part 2
Choose which friend to protect.
Complete Farkas Part 2
Against the odds, your classmate survived.
Complete Althea Part 3
Try going it alone.
Complete Farkas Part 3
Complete Chapter 1
Complete Chapter 2
As Farkas, flirt with everyone you can through Chapter 5.
Complete Chapter 3
Get three people to visit your room in one night.
As Althea, flirt with everyone you can through Chapter 5.
Complete Chapter 4
Heal your new crush.
Heal your new non-platonic BFF.
Complete Chapter 5
Check in with Jóhannes consistently through Chapter 5.
Let fallen enemies live.
Someone died by your hand.
Follow the rules and keep the supernatural to yourself.
Tell secrets multiple times and spy on your host.