Re: How to get AI EMpire to Surrender !?
 

ANother way is to have a big invasion fleet (go after his home system) if he has say 6 planets (small) and the main one invade the six small ones in one turn - demand the surrender - he usually surrenders.

Or another sneaky way is to say he has 4 systems - intel where his spaceports are - attack those planets - that reduces his capacity to generate any resources or research or anything - his fleet becomes less maintainable and he should surrender.

Just make sure you rebuild them as soon as possible or have the racial ability where you dont need spaceports.

Re: How to get AI EMpire to Surrender !?
 

It's already been said that some TDM Modpack Ai's never surrender. In at least some of those cases, I think their speech files have been edited to not contain a surrender dialog, you you might want to check that.

At any rate, you have to be far ahead of them to get a surrender, so here's a plan. Bloackade their Last remaining planet. If you accidentally glass it, demand their surrender, they may do it as their Last turn goes. Also if the planet riots, then rebels, you get a new AI generated, they'll be more amiable, cause they'll use an SE4 default AI.

Here's something else, early in the game, generally, it's a waste of research points to research colonization yourself. But if you've beaten an AI, you've invaded or colonized a lot of prime planets, maybe you should research the other colonization types yourself.

Consider your other AI opponents, if you gave them a bonus, they may already have all colonization tech. It's unlikely they stole it (they can get it via surrender too, not any other way). And they're flying around, snapping up ruins planets and huge breathables ...

Re: How to get AI EMpire to Surrender !?
 

I never ask for their surrender out of fear that they might.