125. DAMNIT DAMNIT DAMNIT!
Missed loads in Africa, most of the Carribean, a couple in the middle east, several in central America, quite a few of the Pacific Island nations, and a number of eastern European/near Asian ones. I also missed a major European country because I thought I'd entered it.
Got pretty much all of Western Europe (as I bloody well ought to!), most of Asia, and almost all of South America. Got a few obscure ones that I only know from doing this kind of game before.
There's only maybe half a dozen I've never actually heard of, it's just remembering them all in 15 minutes is the problem.
And I admit to using the internet to spell-check one of my country names.