Here is the full list of all 25 The Silver Case achievements.
Completed the HIKARI investigation.
Tried to travel into the past.
Survived the White Out prologue case.
Learned about the attempt to build a 25th ward.
Completed the YAMI investigation.
Collected both volumes of Kurayami Dance.
Survived the Danwa case.
Survived the Lifecut case.
Completed the AI investigation.
Survived the Kamuidrome case.
Completed the TSUKI investigation.
Talked to Red 50 times.
Read the Mikumo village documents in order.
Survived the Parade case.
Completed the HANA investigation.
Survived the Spectrum case.
Explored the entirety of the Typhoon apartment complex.
Correctly answered all trivia questions.
Completed the YUME investigation.
Survived the Decoyman case.
Completed HIT & BLOW in 5 or fewer attempts.
Completed the Forest exactly as ordered.
Let a phone ring for a long time.
Survived the Lunatic case.
Collected all Comic Beams.