Sonic & Knuckles

Sonic knows of the Master Emerald hidden somewhere on Floating Island, and is sure that Dr.

Robotnik wants it to give his Death Egg limitless power.

Knuckles probably knows where it is - but can Sonic stop Robotnik's plans and find the Master Emerald all while fighting off Knuckles? Meanwhile, Knuckles is guarding Floating Island when he's attacked by one of Robotnik's robots! He quickly begins a chase for revenge.

Sonic & Knuckles is the fourth game in the Sonic series.

It retains the same basic features as in the previous Sonic games (speed, rings for protection, Special Stages with Chaos Emeralds) as well as the three different shield types introduced in Sonic 3 (Fire, Water and Electric).

Players can select either of the two title characters for play - either Sonic, or the all-new Knuckles the Echidna.

Knuckles cannot jump as high as Sonic, but he can glide by holding the jump button while in the air.

If you glide into a wall, Knuckles will also be able to climb it.

He can also break through walls that Sonic can't.

With these abilities, Knuckles can access different areas from Sonic, making for each level an entirely new experience.

Unlike Sonic 3 , Sonic & Knuckles features three bonus stages - two are available by jumping into the lamppost checkpoint stars (as in Sonic the Hedgehog 2 .

These stages give you the chance to earn bonus rings, lives and power-ups.

The first is a Casino-themed level where you can jump into a slot machine and earn (or lose!) rings.

The second is a more skill-based level where you must time your jumps off orbs to launch higher and collect bonuses.

If you hit the barrier at the bottom of the stage, it ends.

The other type of bonus stage is the "Special Stage" seen in Sonic 3 , which, as previously, can be accessed by jumping into giant rings hid

Sonic & Knuckles for Sega Genesis is currently worth €42.52 loose, €85.05 complete in box, and €531.05 factory sealed. Prices are based on real sales and update regularly on Gamevaro.

Sonic & Knuckles has a steady sales history on the tracked marketplaces, meaning it trades hands regularly and isn't considered particularly rare.

Loose means cartridge or disc only, CIB (complete in box) includes the original box and manual, and sealed means factory-sealed and never opened. For Sonic & Knuckles, loose is €42.52 and CIB is €85.05 — CIB commands a premium because original boxes and manuals are fragile and often don't survive.

The PAL version of Sonic & Knuckles is currently worth €42.52 loose, versus €26.24 for NTSC-U. Regional price differences usually come down to print run size and regional collector demand.