ROMhacker3000 explained that he had spent months compiling a massive collection of NES games into a single, remarkable ROM. The "852 In-1 NES ROM" was a marvel of digital archaeology, containing every NES game ever released, from classics like Super Mario Bros. to obscure titles like "Rollerblade Rodeo."

Typically, a "852 in 1" cart actually contains between . The rest are filler.

: Contra , Metroid , The Legend of Zelda , Castlevania I & II , and Mega Man titles.