Sonic 3 & Knuckles Review. Classic Game Room presents a CGRundertow review of Sonic 3 & Knuckles, developed and published by Sega for the Genesis. This game was played by hundreds of thousands for the novelty of lock-on technology, if not for sheer excellence in platforming gameplay. Play as Sonic, Tails, or Knuckles through both Sonic 3 and Sonic and Knuckles, collect all the Chaos Emeralds, and foil Dr. Robotnik's evil plans once again. This video review features video gameplay footage of Sonic 3 & Knuckles and audio commentary from Classic Game Room's Eric.