Sounds like the absolutely AWFUL movie Tigershark
Three scenes match. There's a part where the "hero" fights a big dude in an arena, both are bare-chested. Near the end, the villain has the "hero's" girlfriend and is trying to rape her. After the "hero" rescues his girlfriend and some other chicks from the bad guys, they run through an exploding village to get to the chopper. One of the chicks gets gunned down on the way to the helicopter.
Here's the IMDB page:http://www.imdb.com/title/tt0094149/
And my comprehensive recap of that pile of dung I posted some years ago:http://www.badmovies.org/forum/index.php?topic=115622.0