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The one and only expansion card officially sold for the CD-i was the '''Gate Array MPEG Digital Video Cartridge''' (DVC), a hardware MPEG-1 video decoder which enabled CD-i Digital Video and [[wikipedia:Video CD|Video CD]] playback as well as enhanced FMV capabilities for games that support it (similar to the [[Sega_Saturn_emulators#Hardware_Features_and_AccessoriesHardware_features_and_accessories|Sega Saturn's Video CD Card]]). As of April 2023 there is no emulator that fully supports the DVC, and several games that rely on MPEG-1 video decoding will be pretty much unplayable without that support. To know whether your chosen games require the DVC, either check the "DVC status" column of [[wikipedia:List of CD-i games#Games|Wikipedia's CD-i game list]], or check [https://github.com/mamedev/mame/blob/master/hash/cdi.xml MAME's CD-i hash list] for games where the list includes <code>&lt;sharedfeat name="compatibility" value="DVC" /&gt;</code>.