Universal ammo

Universal Ammo is a game design concept of all weapons using the same ammo, used in Deus Ex: Invisible War. It is explained that the weapons use nanotechnological devices to transform raw materials in the magazines into bullets. The developers said, that they wanted to avoid the situation, where the player runs out of ammo for his favorite weapon and is forced to use another one.

Universal Ammo is one of the most widely criticized aspects of Invisible War. The players emphasize how unrealistic it feels to put the same magazines to a rocket launcher and a flamethrower.The developers' arguments don't convince them - if you run out of ammo for one gun, all other are useless and you have no choice but to use melee weapons.