Serious Sam: The First Encounter Trailer

This 2001 main game is a high-adrenaline, arcade-style First-Person Shooter where you play as Serious Sam, battling hordes of monsters sent by the entity Mental across ancient Egyptian and alien locales. The core gameplay loop demands constant movement and aggressive engagement against overwhelming numbers of enemies, including the Headless Kamikaze and massive bosses like Ugh-Zan. It blends sci-fi and fantasy elements, focusing purely on frantic, non-stop action across its campaign, which has seen at least one remaster update.