Beating the waves, one at a time, and beating all the waves from 1-50 are two very different experiences.  First off, doing it 1-50 without failing at all is a massive achievement.  Judging by leaderboard scores, I'd say only a few people have beaten Horde on hardcore difficulty with maybe a handful on Insane.  When we did our hardcore runthrough, it took us 8+ hours to complete it on hardcore difficulty on Jacinto.  An insane run would take easily 15+ hours or more.

Crazy!

Been there, done that.

This remembers me I really stink at gears. I can't get past the first full chapter on anything but the easiest mode.

The key is to successfully replant the shields every round and not be a John Rambo after wave 30. Also doing it on a public server with dedicated randoms would be a true achievement.

Thats crazy, Im playing the campaign on insane, just made it to Jacinto. This is hard ass hell.

That is not quite legit. They did it on a private match, so whenever you die, you just start that wave again, it is not that hard

 LOL

Can I put into perspective, beating wave 50 on hardcore is very hard (I haven't even tried) as it is on all modes, but it is not the same as beating horde properly

I only play the game on Normal mode and I still have problems. lol