Riddler

You follow a list of clues in order to find several missing hostages. The clues lead you to a large building with an underground hideout. After going through the door, spotlights flash on you. A man approaches with a green outfit with a question mark on it.

"Welcome hero, to the Lair of Riddles. For each riddle you get correct, my henchmen release a hostage. Get one wrong, a hostage dies. Try to attack me, a hostage dies. Leave, and all of them die! Since you aren't the Bat, I'll start off easy on you. Ready to exercise that little brain of yours?"