Titan

Warhammer 40k

They are "sacred war machines" of the Adeptus Mechanicus. They fuck up your shit. They come in big, bigger, bigger than the last one, damn that's one big mecha and WHAT THE HELL IS THAT GIANT MONSTROSITY?!

They also tend to fuck your shit up.

To elaborate: Titans are the biggest freaking land machines the Imperium has at it's disposal in the GRIM DARKNESS OF THE 41ST MILLENNIUM.

How big are they? Think a giant mecha that is 15-80 meters tall. Your typical troopers on the tabletop are half as tall as your finger is long -- a Titan miniature requires both of your hands to lift. Some Titan minis are bigger than your head, which makes the name "miniature" really a misnomer.

How powerful? Take a couple of Yamato-class battleships and add More Dakka.

How scary? The apocalypse is walking towards you; say prayers to whatever deity you believe in and hope it uses the bolter cannon first, cause that flame thrower hurts.

End of War

Invented by Hitler in 1946, Titans are a walking armarda of recycled "Super Heavy Dreadnought Battleships", they also appear in later series as walking HQ's with plasma rays and railcannons to fuck everything until its bleeding and crying

Mechaton Titan

Bit Lego Mecha, I mean, REAL big Lego Mecha, very stompy indeed...

Greek Mythology

Titans ruled the Earth before the Gods took over Mount Olympus, Titans where enslaved, some are tortured for Eternity while other are forced to do labour, Eg, Atlas holds up the sky, great for Video Games and DM's who like to fuck players without using Mindflayers