Special items included: Required BIOS files and CHDs, prototypes, unreleased games, titles not in English (but only if they are easy enough to play without knowing the language), English-patched translations, games that require light gun, trackball, or steering wheel controls, the Konami Test Board (GX800), the Sente Diagnostic Cartridge, the DECO Cassette Test Tape, and the FamicomBox system. It's extremely important to carry all of the (mostly) extinct physical machines of the past into the future so the experiences they provided will never disappear. The bright sights, the sensory overload of sounds, even the not-so-great smells of retro arcades will always be in my heart and can not be duplicated.
I do find myself lucky to have grown up in the time where classic arcades thrived, but also cursed to watch them die over time. I was a true arcade rat all throughout my youth, and some of my favorite gaming experiences happened on bright, candy-red Neo Geo MVS cabinets.