Modern Warfare 2 - Unlimited Ammo "Bug" for Xbox 360 players

Wednesday, December 16 2009 @ 11:18 AM GMT

The Xbox 360 version of Modern Warfare 2 seems to be suffering from an STD. An ‘unlimited ammo bug’ seems to be spreading itself throughout Xbox Live.

Xbox 360 players have been reporting that they joined a MP match, then finding that ammo counter ‘doesn’t work’ and that reloading times seem to be absent. In other words: unlimited ammo and virtually no reloading, on all weapons, including the AC-130 and the grenade launcher for instance.

But it isn't a real bug; it's created by a Xbox 360 modder. And players get their Xbox cache infected. And it's spreading from host to host...

You can “catch” it from private matches. Once you have it, if you host everyone you’re playing with has the “bug” and infinite ammo. Any game they now host they infect everyone else playing with infinite ammo. Basically infinite ammo is a private match setting that changes your config to be like “Infiniteammo=1″

Thing is, it would reset as soon as you leave the private match. But the private match bug makes it stay on until you enter a new private match where it’s off. When you join a match your console sets it’s settings to match the hosts. This is hard-coded into the engine to make the lobbies work, typically for gametype rules, to make sure everyone matches. This is a global thing. If he turned on god mode everyone would have god mode. If he changed gravity everyones gravity changes.

So someone has infinite ammo=1, you join. yours changes to 1 to match his. Later on someone joins your game, your using infinite ammo=1 so it “infects” his console and changes his.

Typically at the end of the match your console changes all the match settings back, but since infinite ammo isn’t something they expected people to mess with, it isn’t flagged to change back. Since the call to match host settings is a global thing, and the call to change it all back is entry specific.