For me, I've gotten to Round 30 on Underground, but Leaderboard wise, my best is Bakarra at 28. I'm #135 in the world.
30 something on underground. I was 13th when I got it, checked today and I was 21st. I'll try to beat it soon.
my best map is underground also. my highest is like 32. somewhere in the 30's. underground has always been my favorite map in the game. dome is also a good map to play on.
ya i have round 28 on underground, awesome map to play on dome is good too
i like dome, got to 29. I got a good advice: around level 5 place a turret (not grenade turret, a normal one) at number 8 on this screenshot:
Don't place it as u can see on the screenshot, place it behind the boxes, it will last longer.
And place some slaymores to protect it. You will benefit from it: it will give u good points (in my 4 tries it did last 10+ waves)
I like Dome, too. On solo I got to round 14 (not the best, I know).
I love Village, top 35 in the leaderboards Solo....round 33, only died through my own fault...didn't notice an enemy claymore when I was placing mine
Although i'm also top 100 on Bootleg, round 23 solo...can't say i've tried many others yet.
i got to round 37 on carbon in the top 1000 died because i couldnt get back to my spot in time
if i had gotten to roung 40 i would be in the top 100
I got to wave 45 on solo underground which gave me the rank of 13 on the leaderboards XD. It's definitely my best map. (that's on Ps3)