This time the lone soldier theme (of Quake I , Quake II and the Doom series) is replaced by a war. Not as large scale as a military FPS or even Halo, but close enough. There are squad mates, some of which are important to protect, some vehicles (a hovertank and a mech) and frequently changing objectives to achieve. The arsenal contains elements from all Quake games (nailgun, rail gun, lightning gun) and the classic BFG has been replaced by the Dark Matter Gun. Weapons can be improved later in the game, making them much more effective. The game uses a somewhat improved version of the Doom 3 engine to good effect. Multiplayer options are rather limited, offering only the standard Deathmatch modes and CTF.