This is the official photo gallery for Midnight Madness 2015, an epic, all-night puzzle game that took place across Manhattan on August 8 - 9, 2015. Over 250 people participated, and the event raised $3.1 million for the Good Shepherd Services charity. Midnight Madness was a collaboration between Good Shepherd Services, Futuruption, Linked by Air, InsiderNYC, Third Rail Projects, and Elisha Wiesel. Photos in this gallery were taken by Joshua Schwimmer, Mark Chessler, and Lynn Bartner-Wiesel.

NEW: See these photos by professional photographers Rachel Elkind on her website and here, Travis McgeeFred Marcus Studio, and these videos by Ben Cheah and these videos by Oresti Tsonopoulos. You can also watch the silent video (one of the puzzles) and listen to the game's theme song. More photos by staff and players are here. To see all the photos taken by the photographers in chronological order, click here.

Midnight Madness 2015 was a tribute to Audrey Munson, New York City's forgotten muse. For more information, see these articles in ForbesBloomberg Business, Mashable, The New York Observer, The Atlantic, The New York Times, and The Wall Street Journal.