I do not remember the name of my first anime. I am going to outline a few things and perhaps someone will know it.
I was about 10 when I watched (it was on Bravo) it so my description may be vague.
It was about a group of mercenaries who are driving through a desert. They come across a town which is surrounded by a circular wall with entrances on the N S E W. There is a big clock tower in the middle.
The stay the night in an inn. The town doesn't have much of population. There is a blond female character. During the night, a creepy girl knocks on her door and gives her a litter which basically says something like "You are never going to leave alive" or something like that.
Next morning the group try to leave. they drive out of one of the exits and instead of leaving, the are driving in the exit on the opposite side of the town.
At some point in this anime, there are zombies.
At one point, its pointed out that the blond is using a gun that's too heavy for her. she wants to use it anyway as its sentimental, but it sprains her wrist. She also wears a bullet on a chain which is also sentimental.
I don't really remember much more than that. If someone can tell me the name of this anime I would be so happy because nobody seems to have ever heard of it and I'd really like to see it again.