Hardest bosses you've ever fought

[Redgrave]

Aeolus451 said:

Redgrave said:
Yiazmat from Final Fantasy XII, though not an overly difficult boss, was a painful experience that caused me to rethink my life. It took me literally three years of on-off playing to beat it, and I got nothing as a reward.

Every boss from the rebooted Ninja Gaiden series was a pain in the arse.

Oh, that Yiasmat was a bastard. I tried to down him when I was too low of a level and it ended up taking many hours to beat him. He was so cheap. 

I'll never look at another Final Fantasy again thanks to that shitebag.