10 Biggest Boss Battles In Video Game History - Ranked By Size

1. Unicron (Transformers)

Approximate Size: 75,000 miles

Incredibly, a boss the size of a planet isn't the biggest boss we have encountered in video games. The title of the most mind-numbingly, sanity-breakingly huge boss goes to Unicron – the Decepticon mega boss that appears in PS2's Tranformers.

The planet-sized Transformer is one of the earliest creations of the universe and arch-nemisis of the planet Cybertron. As it shape-shifts and uses it's powerful beams to try and destroy the homeworld of the Autobots, Optimus Prime rolls - or rather, flies - out to defeat him.

With Optimus Prime being so large himself, scaling Unicron is difficult, but comic book lore estimates anywhere between 18,000 and 75,000 miles wide. That puts Unicron somewhere between the planets of Neptune and Saturn.

As Unicron fires his cannon on Cybertron, Optimus Prime uses boosters to navigate deep space around the enormous boss, waiting for opportunities to fire on the exposed inner power core. The final battle is a tough one, and extremely fitting that it is against the biggest boss of all time.


What's the biggest boss in gaming history? Let us know in the comments!

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Writer, aspiring author, and I won't stop travelling until I've seen it all. Whilst I might take a break now and then to rant about politics or muse over philosophy, I'm not afraid to roll up my sleeves, buckle down, and spend some solid hours gaming!