It's like a distroyed effect, works well, I just want it. thanks

Futura ND Condensed Bold  Suggested by Tomás Silcher 
MonoFonto  Suggested by Deleted user 428160 

That effect is just photoshopped on a normal font...

Whats the font used?

No idea but you might like this:

http://www.dafont.com/fallout-font.font

ok, thanks anyway

You could also browse the "Destroy" section, there are many similar fonts with an effect:

http://www.dafont.com/theme.php?cat=109&page=1&fpp=50&af=on&text=FALLOUT+3

I gave Google a try.
And Of course Photoshop gave it the eroded look.

+ Eroded effect