No matter if you're a fan, game maker, or game distributor, every pinhead marks the annual Chicago Pinball Expo on their calendar. The annual event is filled with seminars, tours, parts, game sales, and booths showing off the latest toys.

This year's expo, the 29th annual, wrapped up over the weekend. Ars was there to check out the main attraction on the show floor, a section devoted to custom games built using the P-ROC controller board. Some of these games are one-offs that will live on only as cool projects, while others are readying for commercial production. The following gallery has a selection of the custom games plus some other fun elements found on the show floor.