As the action begins players have their pick of four distinct character classes, and weapons, gadgets and specializations. Within these, players have over 15,000 kit variations to discover, and will be able to fine-tune their preferred fighting style to give them the edge in combat that they will need to survive and prevail. In addition, new vehicles like the all terrain vehicle (ATV) and the UH-60 transport helicopter allow for new tactics, which players are free to choose from. As players fight through mission play they will level up their playable character through the ranks as they accumulate experience points in combat for enemies eliminated and objectives completed. Excellence in the battlefield is rewarded with an extensive range of pins, insignias and stars to unlock along with 50 dedicated ranks to achieve. Battlefield 2 also features a major multiplayer component. Along with standard 24-player online multiplayer options across eight maps, players can also compete in 4-player teams in 2 exclusive squad-only game modes, fighting together to unlock exclusive team awards and achievements. During these online battles players can spawn on your squad to get straight into the action, and use gadgets such as the tracer dart in-conjunction with the RPG to devastating effect. Taken together these features make for one of the most realistic ground/vehicle combat experiences ever.