Games like Tantei Gakuen Q: Kyuukyoku no Trick ni Idome!

If you finished Tantei Gakuen Q: Kyuukyoku no Trick ni Idome!, the closest matches are The Room 4: Old Sins, Blacksad: Under the Skin, Omensight, Rusty Lake: Roots and Quern: Undying Thoughts. All 8 share its adventure genre and are ranked by how closely their themes and modes overlap.