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Template:All Game Nav Template:Infobox
Sonic & Knuckles is a platform game in the Sonic the Hedgehog series, developed by Sonic Team in collaboration with Sega Technical Institute, and published by Sega for the Sega Mega Drive/Sega Genesis in 1994. It is the direct sequel to Sonic the Hedgehog 3, which was released earlier that year. The game features unique "lock-on technology" which enables another cartridge to be plugged in via the socket on top.