I hope number 1 is really from this game. It might be also easter egg from another game....

Yes... and they gave the address that way INTENTIONALLY, to prevent e-mail address thieves from adding it to some spambot's address list.

Omg thank you, I sent it and this time it worked!

Glad to help ;-).
And I see you also edited the address out of your post; good idea.

Definitely challenging this one :)

Hell yeah! All I got are 2 "match" but 3 "no clue" ;)

Wow, you're certainly more charming and polite than your avatar suggests!
Thanks again! =D

Heh, thanks; my avatar is Giacomo from Rise of Legends.

Well good luck!
This is too random for me :x
I certainly don't own every game on GOG and going through the lists comparing styles/looks is a bitch much. Most people would still end up guessing.

I still don't get #4. There's probably something really obvious I'm missing here...

That would be a real time strategy...? Maybe a civilian being killed by a tank/bomb/something...?

Maybe it's important what that structure in number 4 is.
Does it look like a bridge? Or a dam? Or something else?

I *think* it's the corner of a space surrounded by (castle) walls; there is a thinner wall on the opposite side, and a thicker one, with railing on the right-hand side (from the point of viewing).

Looks like either an adventure game or a FPS to me.