When players begin Sonic Speed Simulator on Roblox, they'll find that they can't play as Sonic right away and that he takes some grinding to unlock.

Here are all working Sonic Speed Simulator codes as of 28th August 2025: Not sure how to redeem codes in Sonic Speed Simulator? Here’s what you’ll need to do: ...

In this article, we will discuss all the steps and guide you through how to get Knuckles in Sonic Speed Simulator.

The game creator releases the Roblox Speed Run 4 in-game codes. These codes can be redeemed for new dimensions and memes. In-game codes are usually only accessible for a limited time.