Every now and then I run into people with names that extend off the screen in Modern Warfare 2. How can I get a name like that? Steam seems to limit the number of characters I can have when I try.
I don't think there's any secret to it at all. The font is proportional and so it's important to use wide characters. To produce this screenshot I simply entered as many G in Steam settings as was possible. There are probably wider characters.
Indeed, the letter W extends off-screen without having to mouseover the name.
I believe that to achieve what you want, you would need some 3rd party enabler which would be against the game's ToS, I'm sure. I had a suspicion that the Developer's Console would provide some name change abilities(which it may) but unless some things have changed, it seems even enabling the Developer's Console is even considered a 'hack'.