How can you prevent racial migration?

[Geroj]

Let’s say that I want vanilla colonies and instead of invading I eradicate another race and settle new colony to achieve that... but what are your methods to stop immigration from other races colonies into your colonies?

[Vanguard_DW]

I think all you can do is impose a trade embargo, happy to be proven wrong though as I dislike having some of the species mixing with my Humans.

[ASHBERY76]

You can not.I hope the expansion adds policy options so you can stop dirty prawns immigrating.

[the1sean]

LoL Asherby, I feel the same way! Also, how can I keep conquered races from building colony ships that I order from the expansion planner? Sometimes its a bonus when a race is native to a planet type that my colony tech wont allow humans to colonize (usually my race of choice). Most of the time though, I get pissed when freaking rodents build the colony ships that I order from the expansion planner...

[the1sean]

Also, I want the choice to ENSLAVE my opponents, or EXTERMINATE them, like in Master of Orion...