THE FOLLOWING MAY HAVE MINOR SPOILERS - CONSIDER YOURSELF WARNED!
I'm stuck in the final challenge mission - mission 20. There are 4 teams, every worm has 100 health, they're a crafty lot and make very difficult shots with amazing accuracy, and they're all after me. It's me against them all. I can't beat it. I came close the other night, REAL close (had only one other worm left, but he just air-striked my ass).
Can anyone offer a few tips on how to beat this level? How did you do it?