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    Genesis Games
    Sonic & Knuckles + Sonic the Hedgehog 3 (World) - Play Now
    Kirby 64 - The Crystal Shards (USA)

    Kirby 64 - The Crystal Shards (USA)

    Contra (USA)

    Contra (USA)

    Sonic 4: Cybernetic Outbreak

    Sonic 4: Cybernetic Outbreak

    Mike Tyson's Punch-Out!! (USA)

    Mike Tyson's Punch-Out!! (USA)

    Sonic in Chaotix

    Sonic in Chaotix

    Sonic the Hedgehog Megamix 4.0b

    Sonic the Hedgehog Megamix 4.0b

    Sonic & Knuckles + Sonic the Hedgehog 3 (World)(2.4 MB)

    Kirby And The Amazing Mirror (E)(Rising Sun)

    Kirby And The Amazing Mirror (E)(Rising Sun)

    Kirby - Nightmare in Dreamland (E)(Surplus)

    Kirby - Nightmare in Dreamland (E)(Surplus)

    Super Bomberman 4 (English - Translated)

    Super Bomberman 4 (English - Translated)

    Kirby's Dream Land 2 (USA, Europe)

    Kirby's Dream Land 2 (USA, Europe)

    Donkey Kong Country (USA)

    Donkey Kong Country (USA)

    Mega Man X4

    Mega Man X4

    Welcome to Animal Crossing - Wild World (USA)

    Welcome to Animal Crossing - Wild World (USA)

    Super Mario All Stars NES

    Super Mario All Stars NES

    Sonic & Knuckles + Sonic the Hedgehog 3 (World)

    Sonic & Knuckles + Sonic the Hedgehog 3 (World)

    Earthworm Jim - Special Edition

    Earthworm Jim - Special Edition

    EarthBound (USA)

    EarthBound (USA)

    Alex Kidd in Miracle World (USA, Europe)

    Alex Kidd in Miracle World (USA, Europe)

    Sonic 3 Complete

    Sonic 3 Complete

    Sonic Classic Heroes (2022 Update!) (v0.15.03d8)

    Sonic Classic Heroes (2022 Update!) (v0.15.03d8)

    Tomodachi Collection (English)

    Tomodachi Collection (English)

    Sonic The Hedgehog - Triple Trouble (USA, Europe)

    Sonic The Hedgehog - Triple Trouble (USA, Europe)

    Battle City (Japan)

    Battle City (Japan)

    Pokemon Radical Red v4.0

    Pokemon Radical Red v4.0

    Penguin Brothers (Japan)

    Penguin Brothers (Japan)

    Smash Remix 1.5.0

    Smash Remix 1.5.0

    Sonic The Hedgehog 2 (Europe)

    Sonic The Hedgehog 2 (Europe)

    Mario 64 Sonic Edition Plus v2.2.2

    Mario 64 Sonic Edition Plus v2.2.2

    Kirby's Adventure (USA)

    Kirby's Adventure (USA)

    Pokemon Red Full Color Hack

    Pokemon Red Full Color Hack

    Top Gear (USA)

    Top Gear (USA)

    Donkey Kong (USA)

    Donkey Kong (USA)

    Phoenix Wright - Ace Attorney (USA)

    Phoenix Wright - Ace Attorney (USA)

    Sonic the Hedgehog CD (Jun 21, 1993 prototype)

    Sonic the Hedgehog CD (Jun 21, 1993 prototype)

    Chaotix ~ Knuckles' Chaotix (Japan, USA)

    Chaotix ~ Knuckles' Chaotix (Japan, USA)

    Tetris (USA)

    Tetris (USA)

    Cadillacs & Dinosaurs (930201 etc)

    Cadillacs & Dinosaurs (930201 etc)

    Cooler Sonic in Sonic 3 & Knuckles

    Cooler Sonic in Sonic 3 & Knuckles

    Sonic & Knuckles + Sonic the Hedgehog 3 (World)

    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.

    What is Sonic & Knuckles + Sonic the Hedgehog 3 (World)?

    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.

    Game Features

    • 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.

    How to Play Sonic & Knuckles + Sonic the Hedgehog 3 (World)?

    1. Connect Cartridges: Use the lock-on technology by attaching the Sonic & Knuckles cartridge to a Sonic 3 cartridge.
    2. Select Mode: Choose between Sonic 3, Sonic & Knuckles, or the combined Sonic 3 & Knuckles mode.
    3. Character Controls:
      • Movement: Arrow keys or WASD to navigate.
      • Jump/Action: Press Space or Z to jump; X for special abilities (e.g., Knuckles’ punch).
      • A/B Buttons: Use Z (A) for basic actions and X (B) for secondary functions.
    4. Explore Levels: Traverse zones like Ice Cap and Launch Base, solving puzzles and defeating enemies.
    5. Boss Fights: Learn attack patterns and exploit weaknesses to progress.

    Frequently Asked Questions

    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.