In the Roblox universe of All Star Tower Defense (ASTD), there are four secret characters. They can only be earned via "Spins" or "Hero Redeems" in the game. Each spin offers players a 0.

All 12 secret characters in Roblox Anime Fighters Simulator are unlocked from purchasing Stars from specific Star Shops. For example, Dio is unlocked by buying a Star from the Star Shop in Crazy Town.