Sonic the Hedgehog 2

There are two Acts in nearly all of the 10 Zones, and at the end of each Zone's last Act is a machine that Robotnik controls, which you must defeat to progress.

Robotnik wants to conquer the world.

In order to do that, he imprisons and transforms all animals into robots called "Badniks".

This way they can build his powerful weapon, the Death Egg.

Only Sonic the Hedgehog, and his new tagalong partner, Miles 'Tails' Prower, can stop Robotnik and his army of Badniks from taking over the world.

Sonic and Tails can collect rings which are scattered throughout all of the levels.

As with most platformers, when the player collects 100 rings, they earn an extra life.

However, the rings also act as protection; if Sonic is hurt when he is carrying rings, they scatter everywhere and he is briefly invincible.

If he is hit again when he has no rings, he'll lose a life.

If the player reaches a continue point lamppost with 50 or more rings, they'll be able to access the Special Stage.

In this stage, you must gather a set amount of rings in a halfpipe-like stage before you reach a checkpoint.

Complete all the checkpoints and you'll earn one of the seven Chaos Emeralds.

New to Sonic the Hedgehog 2 is the ability to play the game co-op with a friend - at any time, a player can plug in a second controller and take over the AI-controlled Tails.

Tails has infinite lives and the camera remains focused on Sonic, meaning that Tails will not hinder play.

Sonic (and Tails) can now also get speed from a standing start by holding down and repeatedly pressing the jump button for a "spin dash".

This is useful when stuck near steep slopes or other areas where you need some momentum.

The game also features a 2-player versus mode.

This mode is a horizontally split-s

Sonic the Hedgehog 2 for Sega Game Gear is currently worth €11.60 loose, €15.01 complete in box, and €71.64 factory sealed. Prices are based on real sales and update regularly on Gamevaro.

Sonic the Hedgehog 2 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 the Hedgehog 2, loose is €11.60 and CIB is €15.01 — CIB commands a premium because original boxes and manuals are fragile and often don't survive.

The PAL version of Sonic the Hedgehog 2 is currently worth €11.60 loose, versus €9.15 for NTSC-U. Regional price differences usually come down to print run size and regional collector demand.