I'm not sure, but you could try chessgames.com. In my opinion, you can find the most Grandmaster games there.
Opening Game Collections

I'm not sure, but you could try chessgames.com. In my opinion, you can find the most Grandmaster games there.
Thanx, only problem is GM's don't play that rubbish, lol. But I'll have a look

http://www.shredderchess.com/online-chess/online-databases/opening-database.html has only one game played with each of these lines by GMs.

1.d4 Nf6 2.g4 with at least 96 games.
http://www.chessgames.com/perl/chess.pl?node=167470
1.b4 e5 2.Bb2 Bxb4 3.f4 only 8 games
http://www.chessgames.com/perl/chess.pl?node=387176
but with 3.Bxe5 there are over 80
http://www.chessgames.com/perl/chess.pl?node=371576
http://www.file-upload.net/download-1988839/PGN.rar.html
Could somebody please point me to a site where I can download PGN's for obscure opening lines?
I am esp interested in:
1 b4 e5
2 Bb7 Bxb4
3 f4
and also:
1 d4 Nf6
2 g4
Any collection greater than 20 game would be appreciated