The full level line-up for Sonic Generations is still a closely guarded secret at SEGA, but there's no doubt whatsoever that the first stage is a 3D recreation of where it all began: Green Hill Zone.

SEGA just unveiled 23 new screenshots showing Classic and Modern Sonic take on the iconic stage, the former doing little more than running and jumping while his modern day version grinds, boosts, homes and slides around the verdant turf like the hyperactive 'hog we all recognise.

Sonic Generations is out on 3DS later this year.