What hack is that?

Hi.
I see many people in game that basically can predict wherever I go.
It's like they see me behind the wall or something (thats how it looks in kill cam)
Do you know which hack is it? is that a wallhack?
or is there a hack you can see the name of your enemies just like you see your teammates?

Thanks

Chances are it's an ESP (displays names, information, boxes showing you things about your enemies) and not a true wallhack, where players a drawn through walls by virtue of hooking. If you're using teknogods, there's loads of ESP hacks in this section you can use.