Ok, I'll give it a shot. Let's see who can recognize this one:

Hint: the file name is a lie

Hint 2: This is actually a shot from a fairly short cutscene

Hint 3: This game is on GOG.

I think it's not Beyond Good & Evil nor The Longest Journey. right?

How about another picture then?

Dreamfall. Zoe travels with this plane to Russia.

Nice work, you got it!

I guess it's my turn.
So here goes:
That's the battle map without the interface.

This looks like Dragon Commander, but I expected more chaos and mayhem.

Not Dragon Commander. The opponent troops have a flag with a scimitar.
(If that is not helpful I will post another screenshot tomorrow)

King Arthur something?

No, but close. I better give another image or the game will be stalled.
Here goes:

Crusader Kings 1 or 2?

Even closer, but it's not Crusader Kings.

The King's Crusade? (formerly known as Lionheart: King's Crusade)

The similarities are amazing. I, myself got confused when I searched for screenshots of "The King's crusade".
But no, it's not "The King's crusade".
It's published by the same publisher, AND from the same developer. Actually it's the first ever game this developer made.

Crusaders: Thy Kingdom Come

That's the one. You got it.
I figure it's a hard-to-find game since most sites don't write about it, but I was sure someone on gog forums woulf know about it!