15 Biggest Video Game Bosses of All Time

Ugh-Zan III – Serious Sam: The First Encounter

Serious Sam is all about strafing, twitch shooting, and mastery over your arsenal. All of these skills are put to the test against Ugh-Zan III. This monstrous, four-armed demon slowly approaches, summoning hordes of enemies to do his dirty work and throwing blazing fireballs like they’re pebbles. All of this while a UFO hangs ominously in the sky overhead, casting a wide shadow over the battle.