Serious Sam 3 BFE - Secret Hall Of Developers gameplay br Croteam Heads (also known as Big Heads and Fan-Boys) are enemies and an easter egg encountered in the Serious Sam series. br Their first appearance is in Serious Sam: The First Encounter, in the first level Temple of Hatshepsut. They later appear in Serious Sam: The Second Encounter in the first level Sierra de Chiapas as angels. Later, they appear in The Citadel as devils. They also make an appearance in Serious Sam 3: BFE.