The Warriors Street Brawl

Easy achievement to get.

Just go on xbox live player match and play the first mission. (usually a mission has about 3 to 4 levels). There not many people playing this online but you can try (just try on the weekend, usually some people online). Also if a friend has it, you can play online with him as well.

When your in the game make sure to play well (block) and watch your health, because if you die and loss all your health (you have around 3 to 4 health and you can pickup health as well) it will be game over, but this shouldn't be a problem.

Hope this helps you...