The next Riddler trial takes place in Gotham Casino. Find the garage gate, drive inside and take the elevator into the underground. During this trial, you will have. The next part of the Riddler's Most Wanted mission is a puzzle that can be found inside the Riddler garage at the Gotham Casino on Miagani Island. Ri. BATMAN ARKHAM KNIGHT slotsonlinefreecasino.net#!/en-hu/tid= CUSA_.