Think Mr. X, but cheaper and less expat-friendly: they have six rooms, which vary widely in size, as well as English-friendliness. There are five different locations around town, but the most popular is this one in Jing'an. Their most popular one is Dungeon, a vampire themed room which is less audiovisual fancy foofery and more very tricky puzzles. Good if you're more interested in a brain-twister than a theatrical experience. Big, big plus here is that if you fail to complete a room within the allotted time, you can talk to the staff and they'll help you schedule another time for your group to play a second round free of charge.