Sonic Speed Simulator is quite a popular title on Roblox. To celebrate the iconic character's birthday, the studio has launched the Birthday Bash Event.

What Can Super Shadow Do? Upon collecting all seven Chaos Emeralds, characters from the Sonic franchise can go Super.

Sonic Speed Simulator for Roblox adds new characters every other update, and Knuckles the Echidna wraps up the classic character roster nicely.