The Blackmar-Diemer Gambit is one of the most ambitious attempts for white to gain a developmental advantage.
From the second move white looks to give away his king's pawn. Although many top GM's find this to be unsound, many club level players have great success with it and if you are a very aggressive player I recommend playing it from time to time.
1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3 Qxd4 6. Be3
Qb4 7. O-O-O Bg4 8. Nb5 Na6 9. Qxb7 Rb8 10. Qxb8+ Nxb8
11. Nxc7# 1-0