Parabellum is a modern-day military shooter built on the Unreal Engine 3 that gives players the chance to participate in Counter-Strike-style matches against players from around the world. The matches currently being featured on the US and European servers focus more on straight team deathmatch play but there are also options for campaign play as well. Players rank up and earn blood diamonds in the game, which gives them access to even better weapons and custom clothing. In this way, Parabellum avoids requiring players to spend real cash to earn the items required to stay competitive.