Some hyper aggressive lines against Scandinavian??

If you play the Center Counter Defense if 4.b4 Black's alarm bells should be going off. It can be tricky line to play against. From my experience 6...c6?! which normally is a solid move in Mieses line is passive here. I prefer 6...a6 keeping my pieces untangled and allowing c7-c5 in one go if necessary.
Other tricky lines are 4. g3 4. f4
That said IMO once you have studied them, Black shouldn't fear them.

Are you sure it's not a dubious sac?!

Are you sure it's not a dubious sac?!
Yes, it is, in a classical time control game I wouldn’t dare to play it, not even as a joke.
But in blitz is fun and effective if you know how to play it
in online bullet many players mess up with the pre-move and lose their queen by move 4.
You have to have a well studied plan
White can choose to develop their bishop via c4 or g2.
There are several plans you need to know what to play because otherwise you’ve just given away a pawn for nothing.

Are you sure it's not a dubious sac?!
No, it is not dubious. One just needs to know how to utilize his mid-term positional advantage he has gained at the cost of a pawn. White has a slight plus score even at official correspondence chess level, where engine usage is allowed.

How good/bad is transposition to Blackmar Diemer Gambit with 2.d4!?
If your opponents know what they're doing, it's not great, but most of the time they don't.

How good/bad is transposition to Blackmar Diemer Gambit with 2.d4!?
If your opponents know what they're doing, it's not great, but most of the time they don't.
The problem will be... anyone who plays the Center Counter Defense seriously will have faced both 4.b4 and BDG numerous times (and should be booked up to deal with them) Out of the two... IMO the BDG is the least threatening .. just a bunch of tricks.
4. b4 If... 4...Qxb4 IMO must play...a6! example.
On the BDG ( 5. Qxf3 i.e. the Ryder Gambit) doesn't impress...
Basically it's standard Center Counter Defense development.
There some minor lines that I didn't cover in the above (they lead to nothing for White ) 5...c6 the Ziegler defense ,seems like standard Center Counter Defense development moves. In the Opening phase, against a BDG I've never had to really give a good "think" on where my pieces need to go.

The problem will be... anyone who plays the Center Counter Defense seriously will have faced both 4.b4 and BDG numerous times (and should be booked up to deal with them) Out of the two... IMO the BDG is the least threatening .. just a bunch of tricks.
4. b4 If... 4...Qxb4 IMO must play...a6! example.
On the BDG ( 5. Qxf3 i.e. the Ryder Gambit) doesn't impress...
Basically it's standard Center Counter Defense development.
There some minor lines that I didn't cover in the above (they lead to nothing for White ) 5...c6 the Ziegler defense ,seems like standard Center Counter Defense development moves. In the Opening phase, against a BDG I've never had to really give a good "think" on where my pieces need to go.
Thanks for that info! Scandinavian players know the best about various options of white!
However, which line do you think is the most tricky for white among those you have faced till now?

If you want hyper aggressive lines against the Scandinavian as white, you can play e5 instead of exd4. It will transpose most likely to an advanced Caro kann or an Advanced French.
If the French, play a Milner Berry Gambit.
If a Caro kann, play the Shirov attack.
Playing Ne5 in the Scandinavian mainline is also an option.

If you want hyper aggressive lines against the Scandinavian as white, you can play e5 instead of exd4. It will transpose most likely to an advanced Caro kann or an Advanced French.
If the French, play a Milner Berry Gambit.
If a Caro kann, play the Shirov attack.
Playing Ne5 in the Scandinavian mainline is also an option.
I don't agree with 2. e5 against the Scandi, you'll just end up losing positionally to 2... Bf5 3... e6 where Black has a French with the bishop out (or a Caro-Kann with an extra tempo depending on how you want to look at it). Either way, every e6-d5 defense against White is ever so slightly worse than e5/c5 because they have concessions: Scandi loses exd5, Caro-Kann loses a tempo, and French has a bad bishop, and you have to take the concession as White otherwise Black equalizes or gains a slight advantage on move 2.

If you want hyper aggressive lines against the Scandinavian as white, you can play e5 instead of exd4. It will transpose most likely to an advanced Caro kann or an Advanced French.
If the French, play a Milner Berry Gambit.
If a Caro kann, play the Shirov attack.
Playing Ne5 in the Scandinavian mainline is also an option.
I don't agree with 2. e5 against the Scandi, you'll just end up losing positionally to 2... Bf5 3... e6 where Black has a French with the bishop out (or a Caro-Kann with an extra tempo depending on how you want to look at it). Either way, every e6-d5 defense against White is ever so slightly worse than e5/c5 because they have concessions: Scandi loses exd5, Caro-Kann loses a tempo, and French has a bad bishop, and you have to take the concession as White otherwise Black equalizes or gains a slight advantage on move 2.
Yes. Those are valid points but you are not taking into account what I suggest to play as white. The OP asked for "hyper aggressive lines of play against the Scandinavian. "
IMHO, there really are none.
A) White can play 4.b4, but if black responds properly he is just heading to the endgame a pawn up.
B) white can play Rb1 and b4. It's more solid but not necessarily aggressive.
C) white can play Ne5 in the mainline but black can exchange off the knight.
If white chooses to transpose to a different opening, he has access to other options.
A) in the Advance French, the Milner Berry Gambit for white still gives up a pawn but in some lines he gets it back because of the pin. But what he gains is the black king trapped in the center of the board, the black queen displaced to c8, and potential attacks on Black's king side with g4.
B) in the Shirov attack of the Advance Caro kann that tempo that you mentioned , while helpful may not make the difference. Black will lose a pawn on h5, his bishop will be moved to h7 by force and his king will still be trapped in the center of the board. That is certainly "aggressive " which is what white wanted.

If you want hyper aggressive lines against the Scandinavian as white, you can play e5 instead of exd4. It will transpose most likely to an advanced Caro kann or an Advanced French.
If the French, play a Milner Berry Gambit.
If a Caro kann, play the Shirov attack.
Playing Ne5 in the Scandinavian mainline is also an option.
I don't agree with 2. e5 against the Scandi, you'll just end up losing positionally to 2... Bf5 3... e6 where Black has a French with the bishop out (or a Caro-Kann with an extra tempo depending on how you want to look at it). Either way, every e6-d5 defense against White is ever so slightly worse than e5/c5 because they have concessions: Scandi loses exd5, Caro-Kann loses a tempo, and French has a bad bishop, and you have to take the concession as White otherwise Black equalizes or gains a slight advantage on move 2.
Yes. Those are valid points but you are not taking into account what I suggest to play as white. The OP asked for "hyper aggressive lines of play against the Scandinavian. "
IMHO, there really are none.
Exactly... there are none.
There is no magic wand that White can wave to make the Center counter Defense go away. No line to punish Black's "counter" to 1.e4. That said... What the defense suffers from is "Mono Thematic" In other words, compared to main lines, the ideas behind the defense are linear in depth. (IMO which is the only reason why we don't see it more at the top... not because it's unsound.)
To the Club level player... The Mono Thematic nature of the defense is a Boon... and not a bane.
After picking up the defense... playing it, one quickly learns how to "hit back" against the suspect lines White plays in an attempt to avoid it.
Since the op asked what lines by white do I find difficult to play against... here is one ... there are a few (I'm just a club player)

If you want hyper aggressive lines against the Scandinavian as white, you can play e5 instead of exd4. It will transpose most likely to an advanced Caro kann or an Advanced French.
If the French, play a Milner Berry Gambit.
If a Caro kann, play the Shirov attack.
Playing Ne5 in the Scandinavian mainline is also an option.
I don't agree with 2. e5 against the Scandi, you'll just end up losing positionally to 2... Bf5 3... e6 where Black has a French with the bishop out (or a Caro-Kann with an extra tempo depending on how you want to look at it). Either way, every e6-d5 defense against White is ever so slightly worse than e5/c5 because they have concessions: Scandi loses exd5, Caro-Kann loses a tempo, and French has a bad bishop, and you have to take the concession as White otherwise Black equalizes or gains a slight advantage on move 2.
Yes. Those are valid points but you are not taking into account what I suggest to play as white. The OP asked for "hyper aggressive lines of play against the Scandinavian. "
IMHO, there really are none.
A) White can play 4.b4, but if black responds properly he is just heading to the endgame a pawn up.
B) white can play Rb1 and b4. It's more solid but not necessarily aggressive.
C) white can play Ne5 in the mainline but black can exchange off the knight.
If white chooses to transpose to a different opening, he has access to other options.
A) in the Advance French, the Milner Berry Gambit for white still gives up a pawn but in some lines he gets it back because of the pin. But what he gains is the black king trapped in the center of the board, the black queen displaced to c8, and potential attacks on Black's king side with g4.
B) in the Shirov attack of the Advance Caro kann that tempo that you mentioned , while helpful may not make the difference. Black will lose a pawn on h5, his bishop will be moved to h7 by force and his king will still be trapped in the center of the board. That is certainly "aggressive " which is what white wanted.
This could be a best case scenario, but in practice Black usually gives the pawn back to be able to complete his development.
The 4.b4 gambit is 100% playable, and not so easy to counter.
Hey friends,
Please suggest some lines against Scandinavian Defence giving white good attacking chances.