After years of experimenting, Sega has now established two types of 3D Sonic level. The first are the open zones of Sonic Frontiers that give the hedgehog the space and freedom to unleash his speed, the sort of wide open design only possible (just!) on modern hardware. The second are the tightly-focused, mostly linear stages that evolve the side-scrolling original games into 3D rollercoasters with dizzyingly shifting perspectives, a design first popularised in the Sonic Adventure games.
