The popular, free universal iOS app, Gun Bros, has recently been updated. Now, in the latest version of the application (2.0.0) players can take advantage of an online multiplayer mode (via Game Center), more rewards and the ability to purchase more “bros” and earn more war bucks.

Obviously, the best feature of this update is the all-new multiplayer mode, which users can access over Wi-Fi or 3G. When playing online multiplayer, it’s possible to revive your partner, level-up and chat with your “bro” using Game Center’s voice chat feature.

New “Daily Bro-Op Challenges” allow players to earn war bucks, coins and XP points. Furthermore, recruiting more bros will get your more points, too.

Additionally, there’s a new auto-aim feature, along with two new weapons and three new kinds of armour. Currently, Gun Bros is available to download in the App Store for free, and as mentioned, it’s a universal application. Check out the recently updated application, and let us know your thoughts in the comments.