Sonic the Hedgehog platforming of the main levels. The 16-bit "Sonic the Hedgehog " consisted of a giant rotating maze, which many considered a major technical achievement. The most common special stages, however, were segments with the character running through a long tunnel to collect certain items. 3D "collect item" levels, as in "Sonic 3" and "Sonic & Knuckles", used the same perspective but had Sonic collecting all the blue-colored orbs on the surface of a giant sphere. Finally, "Sonic Advance 2" employed a 3D ring-collecting stage, and "Sonic Chaos" ("Sonic and Tails" in Japan) used a variety of gimmicks for its levels.
Adventures of Sonic the Hedgehog released on December 9, 2008, and features episodes 23–44 with the featurette "How to Draw Dr. Robotnik". The third volume contains the final 21 episodes of the series, plus the "Sonic Christmas Blast" special and the featurette "How to Draw Tails". These episodes were not compiled in the correct airdate order in the final volume. These sets were discontinued in 2012 along with "Sonic the Hedgehog" and "Sonic Underground" after Shout!'s deal with Cookie Jar Entertainment expired. In Region 2, Delta Home Entertainment released "Adventures of Sonic the Hedgehog: The Complete Series" on DVD in the UK on June 11,