how they do this?

[OxygenThief]

So I joined a zombie nazi game on world at war and within seconds the sky area on the outside started glowing different colors like red and green and purple then next thing everything was speeded up and we all got infinite ammo. Anyway shortly during this the game stopped.

How do they do this? is it a glitch or a hack? its actually kind of funny.

[nayrcraig]

The W@W zombies is heavily modded online, its hard to find a normal game, same for the multilayer.

Treyarch or activision simply do not have the time or resources to moderate a game as old as W@W

[TheNathanNS]

Hacks.

World at War is not moderated so no one gets banned for hacking unless you report them.

Likewise with GTA IV.