C’thun – World of Warcraft (2006)

If you were bold enough to battle C’thun in World of Warcraft, then you were in for some pain. Introduced with patch 1.9 in 2006, C’thun was insanely tough, randomly swallowing select players and digesting them slowly. Such was C’thun’s power that he could insta-kill raid group members with a single beam attack. Even weakening him for short periods of time did little to affect his health. When Blizzard realized that C’thun was effectively unbalanced, it stepped in to nerf him. Those who were there, however, will remember his terror forever.

The Last Of Us – Clickers

Out of the variety of zombified fungal terrors that make players slowly peak around every corner in the last of us, none is quite so terrifying as the Clicker. The telltale clicks that gave them their namesake are how they see, and how the player knows to be very careful, if they see Joel, not only will they immediately jump him, easily ending the game, but they have a terrible aggro screech that makes us jump every time.