11. Mike Tyson - Punch-Out!!
10. Pre-Nerfed C’Thun - World of Warcraft
9. Gill - Street Fighter III
8. The Twin Emperors - World of Warcraft
7. Grim Reaper - Castlevania
6. Alma - Ninja Gaiden
5. Giygas - EarthBound
4. Absolute Virtue - Final Fantasy XI
3. Solidus Snake - Metal Gear Solid 2: Sons of Liberty
2. Ornstein and Smough - Dark Souls
1. Xemnas - Kingdom Hearts 1.5 HD Remix
http://www.ign.com/articles/2014/04/25/the-most-brutal-boss-fights-of-all-time

Solidus Snake battle was a twat to beat <_<

Just getting to the end of Castlevania was a pain in the ass. I didn't even get close on the original version of the game.

This guy begs to differ.

Also anything in Touhou

The final boss in super smash bros brawl should of made the list

The Dark Souls boss was spot on.