What's The Hardest Arcade Game You've Ever Played?

X-Men.

Such a massive quarter muncher. Last level literally throws every boss at you at once, and the game uses "boss can hit you mid combo" rules.

It's so worth it to get to Magneto though:

"X-Men, Welcome, to DIE!"
"Come, X-chickens!"
"Kill you!"
"You are DEAD, AHAHAHAHAHA!"
"I AM MAGNETO, MASTER OF MAGNET!"

http://www.youtube.com/watch?v=gjuWKAMAlQU&feature=related

Nova said:

"X-Men, Welcome, to DIE!"
"Come, X-chickens!"
"Kill you!"
"You are DEAD, AHAHAHAHAHA!"
"I AM MAGNETO, MASTER OF MAGNET!"

Click to expand...

Reminds me of the Heavy from Team Fortress 2 XD