Here is the full list of all 39 Midnight School Walk 真夜中学園さんぽ achievements.
Play common opening
Check Bad ending “A life where nothing happens”
Check Bad ending “The movie club is abolished!”
Check Bad ending “Mental collapse! Mental collapse!”
Check Bad ending “Reincarnated as a green worm”
Check Bad ending “To different dimension world by psychological test”
Check Bad ending “Maiden’s grudge”
Check Hina’s Bad ending “Jumping suddenly!”
Check Hina’s Bad ending “Infinite stairs hell!”
Check Hina’s Bad ending “Suffocate with a locker that dose not open!”
Check Hina’s Bad ending “Hands extending from the pool”
Check Hina’s Bad ending “Get lost to parallel world”
Play Hina’s ending
Play Hina’s true ending
Check Sera’s Bad ending “Be obsessed by lower-grade spirits”
Check Sera’s Bad ending “Lose ramen greed”
Check Sera’s Bad ending “Ghost master’s hunch is hit”
Check Sera’s Bad ending “Purified in the bathroom! For pneumonia…”
Check Sera’s Bad ending “Regrettable youth”
Check Sera’s Bad ending “Repeated mistakes”
Play Sera’s ending
Play Sera’s true ending
Check Shima’s Bad ending “”
Check Shima’s Bad ending “Falling death in the pool”
Check Shima’s Bad ending “Shima Yukimi resolved for death”
Check Shima’s Bad ending “Real hell”
Check Shima’s Bad ending “Words can kill man”
Play Shima’s ending
Play Shima’s true ending
Check Nanoka’s Bad ending “I’m cursed and alone”
Check Nanoka’s Bad ending “Heart paralysis due to fear!”
Check Nanoka’s Bad ending “Remarks without delicacy!”
Check Nanoka’s Bad ending “Attacked by a huge shark!”
Check Nanoka’s Bad ending “The soul becomes happy but loses its life!”
Play Nanoka’s ending
Play Nanoka’s true ending
Play common ending 1
Play common ending 2
Unlock all achievements