The release of Sonic the Hedgehog in the early '90s was one of the key moments in the famous 'console war' between Sega and Nintendo, and would enable the former to challenge the latter's dominance of the global games market.

Given the success of that first game, you would have imagined that a sequel was put into production without any delay, but amazingly the core team behind the first Sonic melted away after its release. It took the efforts of Mark Cerny - who more recently served as chief system architect on the PS Vita and PS4 - to reunite as many members of the team as possible to work on Sonic 2 at Sega Technical Institute in North America.

The story of how Sonic 2 was made - and how it became arguably the character's best outing - is pretty remarkable, and YouTube channel Splash Wave has done an amazing job of summing it all up. Check out the video above and let us know what you think by posting a comment.