I have been trying for quite a while to come up with a realistic A-Wing model.
This one is not particularly hard to fold and its appearance is reasonably close to an A-Wing but I had to give up many details: The cockpit, the engines, the bottom tail wings and the bottom color pattern.
Let's call it version 1.0 :-)

Start with the uncolored side up.

Valley-fold the center.

Valley-fold the top layer in its center.


Again valley-fold the center.


Make a valley-fold that brings the bottom mountain-fold's edge to the center.

Do the same with the upper half. I took the above picture from a different angle so you can better see how it should look like.



Valley-fold the lower part such that the paper edge aligns with the fold right next to the center line.

Likewise on the other side.


Vertically valley-fold in the center.


Use the horizontal and vertical center folds as references to do an oblique valley-fold as shown above. Make sure that you do not go beyond the horizontal center fold.

Repeat on the lower half.

Vertically valley-fold the left edge to the center.


Do a valley-fold that brings the fold you just made before to the center line.

This picture shows the model in the same state as before but from a different angle to better illustrate the expected state at this point: The previous two steps led to a z-fold.

Valley-fold a corner into the z-fold.

Same on the other side.

Unfold the two corners.

The prefolded corners now need to be squash-folded so that the tail wings can be folded upwards.

Fold the tail wing towards the center and crease.

Now repeat for the other tail wing.

Fold both tail wings upwards.

You are done. If you emphasize the longitudinal center fold it gives the model a bit of a three-dimensional touch where the cockpit should be.