Experience the iconic Sega Genesis platformer Sonic & Knuckles, the only game with revolutionary lock-on technology enabling Knuckles gameplay in Sonic 2 and merging with Sonic the Hedgehog 3 for an expansive, seamless adventure. This genre-defining sequel combines retro gaming innovation, enhanced mechanics, and cooperative exploration, solidifying its legacy as a must-play classic in the legendary Sonic series.
Sonic & Knuckles + Sonic the Hedgehog 3 (World) is a Genesis-type platformer that merges two iconic titles into one expansive adventure. Originally released as a standalone sequel to Sonic the Hedgehog 3, this game introduced Sega’s lock-on technology, allowing players to combine cartridges of Sonic the Hedgehog 3 and Sonic & Knuckles for seamless gameplay. It features Sonic and Knuckles teaming up to thwart Dr. Robotnik’s schemes across redesigned zones, new abilities like Knuckles’ gliding and wall-climbing, and an epic conclusion to the Angel Island saga.
• Lock-on Technology: Seamlessly merge Sonic the Hedgehog 3 and Sonic & Knuckles cartridges for a unified experience.
• Expanded Zones: Reimagined levels from Sonic 3 with added challenges and Knuckles-exclusive areas.
• New Abilities: Play as Knuckles to access unique skills like gliding, digging, and climbing walls.
• Boss Battles: Face off against Dr. Robotnik’s mechanical creations in multi-phase showdowns.
• Co-op Mechanics: Alternate between Sonic and Knuckles in drop-in/drop-out multiplayer modes.
What is lock-on technology?
Lock-on technology allows physical cartridge connection between Sonic & Knuckles and Sonic 3 to merge gameplay, enabling features like playing as Knuckles in Sonic 2.
How do I access Sonic the Hedgehog 2 content?
Insert the Sonic & Knuckles cartridge into the Genesis console first, then attach the Sonic 2 cartridge to the back of it. This unlocks Knuckles as a playable character in Sonic 2.
Can I play as Knuckles in Sonic 3 & Knuckles?
Yes! In the combined mode, select Knuckles at the title screen to use his unique abilities throughout the game.