I know one that's kinda weird and not always possible but it has a 56% win rate for black (That's a lot). It's called the Norwegian Gambit.
Gambits for black agianst e4????


but is it sound if white doesent just mess up? because if g3 isint played white will likely just be better

i am looking for a sound/semi sound opening for black agianst e4 that gambits a pawn or 2 for initative and a good fight
i seek this as a benko/benoni player because i am perfectly willing to give up a pawn for initative and a fight
i will bump this untill i get responses please resond
Long story short, no! There is not!
Garbage like the Latvian Gambit or Elephant Gambit are flat out unsound.
Otherwise, you basically have normal, everyday defenses. Some of them more aggressive (Sicilian/French) while others safer and focused on equalizing first (1...e5/Caro-Kann).
No matter what you play, White can play a dull line:
Sicilian - Alapin
French - Exchange
Caro-Kann - Exchange
1...e5 - Slow Italian

but is it sound if white doesent just mess up? because if g3 isint played white will likely just be better
It's +0.8 for white and the only good move is Qe4. If they do that, play normal developing moves like Nc6, Nd7 or even e6 and it's basically a draw. g3 is almost three times as common as Qe4, so it's very likely to be a winning position for black.

The only chance you have for a good “gambit” against e4 is this line.
And this isn’t even a gambit. It’s just an equal trade. These moves are complicated, yes, but even if you watch GothamChess, you’ll understand that this makes use of “his” “danger levels”.
Plus, the Najdorf has like, at least 5 other lines. These are all sort of mainlines.
But why? You could play a6 or the Berlin. You have better options here.

I think of the Latvian as very risky, rather than utter garbage; real gambits, after all, are risky. Whites favorite 1.e4 line goes out the window, and although black has far less room than white for error, the gambit is far better than it first appears. Or you could let White play his favorite Ruy line and let him walk into the chess minefield of the Marshall gambit. Play the Latvian, your opponents will either laugh at you, think you are infected with rabies, or have become Chess-Gollum and are trolling them---some will be correct, the rest will be humiliated.
i am looking for a sound/semi sound opening for black agianst e4 that gambits a pawn or 2 for initative and a good fight
i seek this as a benko/benoni player because i am perfectly willing to give up a pawn for initative and a fight
i will bump this untill i get responses please resond