Adventure
AI: The Somnium Files
Give it 15 hours
Gets good by 15h then rated almost like by veterans
Fully opens up by 20h rated like by long-time players
Reach the ending 50% of players who started
Started playing 79% of owners
Steam reviews 91% positive of 9,461
What the data shows
- In the first 2 hours 1 in 3 reviews are negative (32%); after 20h it's 1 in 20 (5%).
- Fully opens up by hour 20.
- 50% of players who start reach the ending.
- The biggest drop-off is between “BRaiN: Memories Hidden in Dreams” (Day 1: Friday - Cleared Date's Somnium) and “PaiN: Mother, Blood, and Secrets” (Day 2: Saturday - Cleared Mizuki's Somnium): from 100% to 79% of starters.
- 79% of owners got the first achievement.
When it gets good
Share of positive reviews by how many hours the reviewer had played when writing the review.
before it gets good opening up fully opened up
Based on all 9,489 Steam reviews in every language. Median playtime in a sample of 298 reviews: 26h for positive, 9.3h for negative. Almost every game is rated lower in the first 2–3 hours: that window includes refunds and quick first impressions. What matters is how deep the dip is and how fast the game recovers.
Where players quit
Share of players who started the game and reached each story milestone. 100% is the most common achievement (79.4% of owners), so people who bought the game and never launched it don't count.
- Started playing 100%
- BRaiN: Memories Hidden in Dreams Day 1: Friday - Cleared Date's Somnium. 100%
- PaiN: Mother, Blood, and Secrets Day 2: Saturday - Cleared Mizuki's Somnium. Most players quit here 79% −21
- VaiN: Disassociated Persona Day 3: Sunday - Cleared Iris's Somnium. 65% −15
- Resolution Route: END Finished the final investigation. 50% −14
story milestone ending biggest drop-off
Story milestones were labeled by AI from achievement names and descriptions; mistakes are possible.
All achievements (45)
story milestone ending side
- BRaiN: Memories Hidden in Dreams Day 1: Friday - Cleared Date's Somnium. 100%
- Dream Documentation Duty: Intern Found 1 hidden item in Somnium. 88%
- PaiN: Mother, Blood, and Secrets Day 2: Saturday - Cleared Mizuki's Somnium. 79%
- VaiN: Disassociated Persona Day 3: Sunday - Cleared Iris's Somnium. 65%
- "The Secret Lives of Yakuza Wives" Cleared the shooting event at the Kumakura office with no misses. 63%
- VILLaiN: Evasive Memory Day 3: Sunday - Cleared So's Somnium. 62%
- CURTaiN: The Other Side of the Black Curtain Day 4: Monday - Cleared #89's Somnium. 60%
- SWaiN: My Hero Day 4: Monday - Cleared Ota's Somnium. 59%
- MaiN1: Antinomic Conflict Day 4: Monday - Cleared Iris's Somnium. 58%
- CAPTaiN: Bonds Revealed Day 6: Wednesday - Cleared Date's Somnium. 57%
- Mizuki Route: END Finished Mizuki's investigation. 57%
- "MUSCLES GALORE! Men's Gymnastics Routines" Cleared the shooting event at Golden Yokocho with no misses. 57%
- SUSTaiN: Indelible Memories Day 5: Tuesday - Cleared Mayumi's Somnium. 57%
- Ota Route: END Finished Ota's investigation. 56%
- MaiN2: The Eternal Ceremony Day 5: Tuesday - Cleared Iris's Somnium. 55%
- Iris Route: END Finished Iris's investigation. 55%
- Appendix Analyst Collected 100 "Appendix" files. 55%
- MOUNTaiN: Corpse Flower Day 5: Tuesday - Cleared Hitomi's Somnium. 52%
- REFRaiN: Echoes of Murder Day 5: Tuesday - Cleared Boss's Somnium. 51%
- Annihilation Route: END Finished Annihilation Route investigation. 51%
- CHaiN: % s ! n k Day 6: Wednesday - Cleared Saito's Somnium. 51%
- Persons Analyst Collected all the "Persons" files. 51%
- Cooler Heads Prevail Kept your cool and did not shoot Saito. 51%
- Resolution Route: END Finished the final investigation. 50%
- "H***y Housewives In H***" Cleared the shooting event at the Sagan residence with no misses. 45%
- "The Congressman's Secretary's Warm Reception" Cleared the shooting event at the Sejima residence with no misses. 45%
- Date's Atami Date Route: END Asked out the receptionist to Atami. 45%
- Your Name? Enjoyed a fulfilling chat with Kagami. 42%
- "The Erotic Legend of Atlantis" Cleared the shooting event at the Warehouse District with no misses. 41%
- Interrogation: Implicate Hitomi Confronted Hitomi with the evidence with no mistakes. 37%
- Bonephilia X-rayed the Mermaid. 34%
- The Dream Wanderer Saw This Man twice in Somnium. 31%
- A...Do...Rab...Bit... Almost got cursed by Adorabbit in Somnium. 30%
- Surprisingly Good Together Discovered the marriage of the yakuza and the nurse. 29%
- I Wish Mine Were That Glorious Admired the Sagan's stereo equipment. 29%
- Dream Documentation Duty: Manager Found 6 hidden items in Somnium. 23%
- Interrogation: Implicate Ota Confronted Ota with the evidence with no mistakes. 20%
- Interrogation: Implicate Iris Confronted Iris with the evidence with no mistakes. 19%
- Crazy Awful Customers Saw three autographs of crazy customers in Somnium. 19%
- Interrogation: Implicate So Confronted So with the evidence with no mistakes. 18%
- Boss Mania Checked absolutely everything in Boss's office. 15%
- Protect Your Head Had Aiba wear the basket and the pot in Somnium. 14%
- Dream Documentation Duty: CEO Found all hidden items in Somnium. 12%
- Dream Album Analyst Collected all the "Dream Album" files. 12%
- AI: THE SOMNIUM FILES Obtained all other trophies. 9.9%
Steam page Updated: 2026-10-19.