Didn't try it with no upgrades that is for sure.

Though, if you did, hat's off to you. I'm definitely not there yet. Not in the last stage anyway.

I'm not sure, but I have my doubts anyone could survive that long on iron man without taking one hit. I guess it's not so bad if you still have weapons upgrades, but that just seems insane. I'm in 25th myself right now.

I don't recall because this was awhile ago. Maybe just Iron Man? Wonder who has the high score now?

Which modifiers did you use to get this score? I'm just playing without weapon upgrades to try to beat my own high score.