Boom is an Epitaph map retouched and equipped so that each game is accompanied by a constant sound: boom.

The map is equipped with rocket launchers, brute shots, fuel rod guns, a single flamethrower, and a single gravity hammer. Add in to the mix grenades scattered everywhere and plasma coils waiting to go off at a moment's notice, and it becomes clear where the map gets its name.

Deaths happen in Boom often (as you might guess), so it can be a very fast-paced game. And while accuracy isn't always rewarded as much as wanton random grenade flinging, quick reaction times are vital. Many times, you hear rocket fire just in time to turn around a let loose a shot of your own, hoping that you're at least in the vicinity.

In addition to the constant explosions, Boom offers a custom powerup that, when combined with the Boom custom game type, gives super speed, invisibility, and other benefits. To get to the outside platform that houses the powerup (and a Spartan laser), you must pass through the teleporter obscured by the giant yellow hologram.