There's an another bug: When I meet that hero troll and the cinematic starts, the aliens destroy my base at the same time.
Well, I almost played this campaign through, but in the caverns I had gotten the orcs to help the dawrfs but they just disappeared somewhere and the quest log showed that I still hadn't completed that requirement.
There were too much units to be killed in that one hall!!!! They just kept coming from that hole in the wall cave and the room was full of them, how can this be!?! I had killed over 1000 units...

and after I finally got through I could't find a way forward after getting rescuing that dwarf smith and I couldn't find anymore remaining enemies so I used the cheat. Is this a bug or...?
After that in the next act outside the dwarf stronghold the orcs started moving away, but I couldn't kill those legion skeletons in hard, that's too hard. Has anybody succeeded in this? I played that act with easy and moved to the last act.
The last act was too hard for my and I seemed it would take like forever to destroy the whole Undead base so I used the cheat... again.
The campaign had too much bugs and I couldn't see how that alien thing could fit in the campaign. I think it could have been better off... and I didn't like so much that orcs had a sheep god.
The last act was obviously best and there was good use of custom models and music. 3.4/5 points.
Is there something in the original version. Why should I try it?