Here is the full list of all 20 HuniePop 2: Double Date achievements.
Earn your first pair of fairy wings.
Earn your first pair of fairy wings within one in-game day.
Collect enough fairy wings to summon the Nymphojinn.
Collect enough fairy wings to summon the Nymphojinn within 15 in-game days.
Return the Nymphojinn to a satisfied slumber.
Return the Nymphojinn to a satisfied slumber on Incel/Femcel (Hard) difficulty.
Earn a 100% completion rate.
Earn a 100% completion rate on Incel/Femcel (Hard) difficulty.
Successfully complete 8 Alpha Mode dates.
Successfully complete 24 Alpha Mode dates.
Successfully complete a Non-Stop date of 8 or more rounds.
Successfully complete a Non-Stop date of 16 or more rounds.
Successfully complete a date with at least 20 moves remaining.
Successfully complete a date with both girls having maxed out passion, sentiment and stamina.
Successfully complete a date wherein the girls become exhausted or upset at least 8 times between them.
Earn 5000 or more affection from a single token match.
Select the "top" reward from Kyu for saving the universe.
Select the "middle" reward from Kyu for saving the universe.
Select the "bottom" reward from Kyu for saving the universe.
Submit the secret code that unlocks this hidden achievement.