there's also the infamous budapest gambit: 1.d4 nf6 2.c4 e5. Black's plans to attack the king side and if white isn't careful they could even be smother-mated! eg: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3 Nc6 5. Bf4 Bb4+ 6. Nbd2 Qe7 7. a3 Ngxe5 8. axb4 Nd3#
there's also the infamous budapest gambit: 1.d4 nf6 2.c4 e5. Black's plans to attack the king side and if white isn't careful they could even be smother-mated! eg: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3 Nc6 5. Bf4 Bb4+ 6. Nbd2 Qe7 7. a3 Ngxe5 8. axb4 Nd3#