This movie showcases the competition mode of Sonic the Hedgehog 3. Here, nitsuja and mmarks aim to complete each level in the fastest time possible. This run is also the fastest anyone has completed each level in Time Attack.
We also have similar runs with Sonic and Tails, Amy, Knuckles, Tails, Knuckles ring attack, Sonic 100%, Knuckles 100% and Sonic and Tails on NewGame+.
Watch this TAS be played back on a real Genesis.