In Speed Run 4, the first and cheapest skull is Zombie Mode. It's unlocked after the player earns 30 stars, and when it's turned on, both of the skull's eyes glow red.

What are Roblox Codes? The Roblox game Speed Run 4 is a racing game created by @Vurse. If you are looking for the latest 'Speed Run 4' codes, then you have come to the right place.