Borderlands is a masterpiece. But it's not for anyone under 11. This game allows you to shoot, collect, reload, explore, etc. It's a lot of fun.
First, let's start with the violence. It's iffy. There are some rough moments, where unrealistic(and usually minor)blood will drop from the enemies and there will be headshots. There's not much else. If your tween is familiar with games like Modern Warfare 2, then this won't be a problem.
The characters aren't the greatest role models, but they're certainly not the worst. They risk their lives for an adventure(or just to shoot) and do whatever it takes. But, in the progress, most players will become sidetracked from their ultimate goal of completing the game by collecting guns, ammo, and money scattered around the town.
There are over a million guns to find and they all have their
special abilities and powers. This game became famous for
that. However, the messages aren't always positive. For one thing, you can kill anything you want. It's a little.. how you say, over-the-top at times once you think about it. But if you compare it to Grand Theft Auto, it's nothing. There's also some mediocre crude humor here and there, but if your tween is very mature, then it's alright.
Pandora is lively and you'll love talking to people, roaming around, and shooting anything that gets in your way. The language isn't heavy, but you can't help but wish that your tween won't get in trouble at school. There are very little F-Bombs, the words they use the most are "D*mn" and "S**t".
You can level up as you progress, and that means you'll get stronger, and the enemies will get more violent. There's even something that when you run out of health, you have the chance to respawn at a checkpoint or shoot down an enemy to revive yourself at that area. Some parents might think it's a little scary, but it's actually IMPORTANT for your character.
The game is an overall great adventure for both adults and tweens, but only if your tween is familiar with shooters, and is mature enough. If not, you might want your tween to rethink everything and give it a wait. But, if they do meet the expectations, this is a blast for them to try out.