Also available are 'mutators' which drastically alter gameplay aspects, such as 'InstaGib', the use of which makes players compete with instant-kill weapons instead of the normal ones. Weapons include Enforcers, Rocket Launchers, and Rippers, which fire ricocheting blades.

Each weapon has two firing modes which have different effects: for example, Rippers can also fire non-ricocheting blades which explode on impact. A special weapon is the Redeemer, which causes a very large and powerful explosion. Items such as Body Armor (which reduces damage taken), health packs (which heal players), and Damage Amplifiers are scattered across levels. Levels are set in a variety of environments, including spaceships, outposts, and buildings such as castles and monasteries. Many contain features such as elevators (lifts) and teleporters, and obstacles such as water and lava. The game is backwards compatible with the majority of Unreal multiplayer maps. The PC version includes a level editor in which players can create their own levels, and the PlayStation 2 version supports the use of a USB keyboard and mouse, enabling players to play in a similar manner to the PC version.

Combat arms classic voting