"Sonic 3D Blast" is a platform game presented from an isometric perspective. Players control Sonic the Hedgehog, whose goal is to save the Flickies, collect the seven Chaos Emeralds, and defeat Doctor Robotnik and his robot army. Sonic retains most of his abilities from prior games: he can jump and spin in mid-air to defeat robots or hop on platforms, perform a spin-dash on the ground to gain speed, and collects rings as a form of health. Sonic can also collect power-ups, such as elemental shields, speed shoes, or invincibility, by breaking television monitors containing them.