Frontlines: Fuel of War is a first-person shooter game  for the Xbox 360, PlayStation 3 and Microsoft Windows. It is being produced by Kaos Studios, previously known as Trauma Studios, who produced Desert Combat, an extremely popular modification for Battlefield 1942.

    There are six unit classes in total, and four different roles. The classes range from sniper to shotgunner to rifleman, and are designed to cater to all needs that may arise in combat. The six classes are the Assault class, the Heavy Assault class, the Sniper class, the Anti-Vehicle class, the Special Ops class, and the Close Combat class
The roles are as follows: Ground Support, EMP tech, Drone Tech, and Air Support. The roles are upgradeable thrice, in an RPG style twist.
The levels will presumably unlock better equipment, and make the player harder to kill.
Frontlines also has an interesting bonus role. It is Artillery Support. This bonus role requires the player to scout out positions and mark the area in the mission. To unlock this bonus you must finish the game on the hardest level of gameplay.

    THQ recently announced the launch of an alternate reality game (ARG) for Frontlines: Fuel of War in order to promote the game via the website http://www.exeoinc.com. Visitors are challenged to unearth the mystery surrounding Exeo Incorporated by finding ten passwords scattered across the net. Once players find all ten, they qualify for real fighter-pilot training at Air Combat USA, plus a free copy of Frontlines: Fuel of War.