Coded Arms takes place in an abandoned virtual reality system and its portal site inside a giant computer network. The VR system was originally created as a combat training simulator in the event of an alien invasion. However, during the development of the simulation program, a major flaw was discovered and development was cancelled and left abandoned. During this time when the program was not monitored, it kept evolving within the computer network and eventually turned into a vast and brutal VR world populated with virtual alien invaders, dangerous computer bugs and the VR system's own security bots.   Players take the role of a computer hacker who infiltrates the abandoned virtual reality system. Gamers will use weapons and power-ups that they discover while exploring the expansive single player mode. Coded Arms will also utilize the PSP handheld system's wireless capabilities for multiplayer action for up to four people. To enhance the multiplayer experience, gamers can bring over their items they collect from the single player mode and use them in the multiplayer mode to defeat other players and enemies.   To battle deep into the heart of the unchecked system, players will fight through more than five different game worlds with multiple gameplay levels. Players will encounter three different types of enemies, including soldiers, bugs and bots. More than 30 different weapons will be available to battle the horde of virtual creatures, including real world weapons such as sniper rifles, machine guns and grenades, and more fantastic armaments such as pulse rifles