Close case 1: Malice In Wonderland.
Close case 2: Tome Alone.
Close case 3: Disorient Express.
Close case 4: Police Farce.
Close case 5: Loch Mess.
Close case 6: Don Of The Dead.
Spot the Darkside SkyBeast.
Watch the credits to the end.
Check Roy's Alibi.
Close case 7: Buy Hard.
Close case 9: Baits Motel.
Close case 8: Polterguys.
Listen to all of John's gags.
Give Laxatives to McKing.
This game contains additional secret achievements. These currently cannot be retrieved from Stadia.