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Play Sonic 3 & Knuckles (Lock-on combination · US edition) Online
Sonic & Knuckles + Sonic The Hedgehog 3
Play Sonic 3 & Knuckles online as Sonic, Tails, or Knuckles. Explore the full linked adventure, master character abilities, and collect Super Emeralds.
Browser play
Sega Genesis / Mega Drive — EmulatorJS controls
Default Player 1 keyboard mapping. Change keys in Controller Settings.
| Console button | Keyboard |
|---|---|
| ↑ / ↓ / ← / → | ↑ / ↓ / ← / → |
| A / B / C | S / X / Z |
| X / Y / Z | Q / A / E |
| START / MODE | Enter / V |
Open Controller Settings to configure your keyboard or gamepad. Touch controls are available on mobile.
How to Play Sonic 3 & Knuckles
Quick start
Choose Sonic, Tails, or Knuckles and play the combined Sonic 3 and Sonic & Knuckles adventure. Keep rings for protection, use each character’s ability to open routes, and enter giant rings to collect Super Emeralds.
Controls
D-pad: Move, look, crouch, climb, or steer. A/B/C: Jump and spin attack. Sonic presses again in midair for the Insta-Shield or a shield power; Tails taps repeatedly to fly or swim; Knuckles holds after jumping to glide and climb walls. Down plus repeated action inputs charges a Spin Dash. Start: Pause.
Sonic 3 & Knuckles Game manuals
Cheats
No cheats have been added for this edition.
Player verification and sources
Browser play was reviewed before this edition was published in the catalogue. The date below is the catalogue publication date, not the game’s original release date.
- Browser test and catalogue publication date
- Browsers and devices
- PC: Chrome, Edge and Firefox. Mobile: Chrome on Android and Safari on iPhone and iPad.
- Player engine and core
- EmulatorJS 4.3.0-pre · segaMD
- Tested by
- rwEmulator
Sources and editorial basis
rwEmulator reviews edition metadata, release information, game manuals and first-hand browser-play notes. Available manuals are linked below; the editorial policy explains how facts are checked and corrections are handled.