5.56mm Full Metal Jacket is a Doom 3 multiplayer total conversion which takes place in fictive environments all over the world in the year 2020 where the 2 remaining superpowers (West and East) send their best men to outplay the enemy and be first to dominate the area of operation. The special forces teams consisting of battlefront experienced marines, skilled engineers and expert scientists fight it out on a great variation of different maps which range from huge deserted outdoor complexes to the narrow spaced metallic stations of the 22nd century (time travel).

FMJ is one of the very few multiplayer online shooters that provides absolute precise damage and ballistics calculations. Every bullet fired in FMJ is actually rendered as a single 3d bullet object that travels through the virtual space being affected by physical parameters such as gravity. Furthermore FMJ makes use of Doom3's introduced per-poly-hit-detection-system which is superior in any thinkable way compared to the system used in common 3d shooters (hitboxes). FMJ makes use of the "unified light and shadowing" concept to the fullest and renounces faking or skipping features.

Accordingly to your team you receive the full weapon-arsenal available supported by your side. There are 7 classes of weapons ....Fists/Flashlight, Pistols, Shotguns, Sub-Machineguns, Assault Rifles, Sniper Rifles and Grenades.

Although FMJ is considered a first person shooter it provides the player a third person view to help you get a better overview during intense firefights or just to enjoy the virtual world from a different perspective.

FMJ features 25 unique maps and 3 different gametypes which are: Capture the Flag, Team DeathMatch and Capture & Control.

The player can choose from 10 unique player models picking the avatar that fits him most. To enhance gameplay and game-fun fully customizable and voteable AI players have been added to the game which can run in dedicated or listen server mode and render the gamer independent to an internet access. Features like "player inactivity control" or "server banning" are just some of the tools provided to serveradmins.

FMJ 0.95 is crossplatforming and fully compatible with Windows Vista, Windows XP, MacOS and Linux.