Here is the full list of all 26 NSG achievements.
Lose the contest and mourn your friend's death
Lose the contest, receive a proposal and mourn your friend's death
Win the contest and mourn your friend's death
Lose the contest and cheer for your friend's recovery
Lose the contest, receive a proposal and cheer for your friend's recovery
Win the contest and cheer for your friend's recovery
Lose the contest and hug your friends
Lose the contest, receive a proposal and hug your friends
Celebrate your victory together
Have a serious conversation with Angela
Go inside Téo's bedroom
Go to Téo's funeral and pay condolences
Visit Téo at the hospital to learn he's in a coma
Visit Téo at the hospital to know he's alright
Unlock all possible endings
Accept Tales' help
Refuse Tales' help
Sell alcoholic beverage to Téo
Refuse to sell alcoholic beverage to Téo
Support your friend Téo
Don't support your friend Téo
Tell Téo the truth
Support your friend Heloísa
Learn what NSG means
Answer everything right
Answer everything wrong