You're supposed to do it with just one side but Orks are bugged and 99% of the time will start you off with zero resources. No idea how to do them.

Chaos is fairly easy, cap the surrounding points, turret up the northern point and tech up. If you get a couple of squads of possessed they will destroy near anything and support them with defilers/dreads/horrors.

Just don't take too long as the chaos timer is the landraider reaching the gate. teleporting in horrors while your army distracts the rest of the marines will bring it down pretty quickly.

Thanks a lot. What about further missions? Will my choice affect on the next chapters?

There's only one more mission but yeah it's different for each race depending who you side with in this mission.

Thank you again.

So back to this very orc mission: how to beat it with them? Any ideas?

able to rush them to begin but then getting past the imperals causes problem

btw also attempt horrors to take down ork target mabye that will cause some issues for the elder since there too fast

Thank you. But it is not a real way to solve the problem.

it worked for me XD
i was able to beat both ork and chaos with same save
just oblierate the elder main hq building nd that will stop them
use chaos to do it wont affecct the game outcome at all

So your tactic is to get orc's points with chaos side. I get it. But I still want to know what is the "proper" way to do it. I mean what we supposed to do according to the creator's mind.

z the creators mind didnt give us any descrption

So that is why I created the topic. Maybe there is a person who did it nicely and smoothly.

What you need to do is like this: Press esc to skip all cutscenes (including side switch transition) then switch to Orks immediately. Select your starting forces and rush the Eldar's big webway thing and destroy it off the bat then switch to chaos (the orks can clean up on there own, only thing you're likely to lose are the trak vehicles). On Chaos side you basically wanna build up to get a demon pit as fast as possible, but you should also drop some turrets at the northeast and northwest sides of your camps to defend against Guardsmen units. So build your stuff quickly and then start producing a ton of those little fleshy demons that shoot fireballs, send your forces up north towards the BROKEN section of the fence (somewhere's to the left of the center) and a little north a head of you the tank should be coming or already there and use your little demons to rip it apart (spawn them in FRONT of the tank while your possessed soldiers/marines deal with the ultramarine and chaplain squads.) Once these two goals are completed I suggest making a save of the game you can go back to cause once those two goals are done you can pick the side you want and take your time building an army, then when you beat it with one side you can load that save and beat it with the other without having to rush again.

Oh boy at last. I have already started to play a next game in the series but still want to finish this. Thanks a lot. I will leave some commentaries after applying this data.

If you're still having difficulty without using that strategy, friend me and I'll see if I can't talk you through it.