Sonic Mania’s release date is speeding towards us, so it makes sense that Sega would be showing off some of the game’s early levels at E3. Polygon have just uploaded footage from Chemical Plant Zone – Act 2 recorded on the E3 show floor. Chemical Plant Zone was first introduced in the timeless Sonic the Hedgehog 2 back in 1992. Are you excited to see this classic level return in the new game? Tell us below.