Rocket League Biomass decal is a black market decal making it one of the rarest decals in Rocket League. Since the removal of crates, this Biomass decal can only be obtained through trading with players, purchasing in-game for 2000 credits or buying on our website here for a much cheaper price than in the game!
Released in 2016, the Biomass decal can be found as a certifiable item. What is a certifiable item? A certifiable item in Rocket League is a special item as it records data. There are many different versions but one example could be that your certifiable biomass decal records how many saves you have made whilst using it.