How to free a slave.

[Cedunir]

I bought a slave, carried him on my shoulder and brought him to my base.
On the way, I fed him and removed his shackles when he was unconscious.
Now he's standing around in front of my base, marked as green.
Do I just have to wait or will nothing more happen?
Have I done something wrong?

[Bomb Bloke]

If he's standing around your base then he's probably trying to follow the unit who freed him. He won't actually show the "following" action unless there's some distance between them, so try moving his "saviour" away to see what happens.

Once a following slave has had enough time (and possibly been made to run a certain distance?), he'll either join your faction or run away. Sometimes purchased slaves will either run or join immediately on purchase, but usually you'll have to sit through the "following" period first. On occasion freed slaves will start conversations with you, allowing you to choose whether they're allowed to join or not.

It's indeed a good idea to pick up following slaves when they're in NPC towns, since they often tend to get into fights with the other occupants if you don't.

Certain slaves will never join you.

[Cedunir]

Thanks!
The liberator has left the camp for new adventures.
I'll wait and see, maybe something will happen.

[Cedunir]

After writing here and restarting the game, he run away :)

[rompier02]

Hey. Just wanna add if you looking to recruit good slaves in terms of fighting skills go to the Slave Market in the south. Usually there will be abundance of Red Sabers & Swamp Ninjas. Down side is gotta have lots of money. Some slaves can cost up to 14K with no guarantees they will join. This is due to their high combat / toughness skills. However sometimes the guards will attack the slave you freed. So save first.

Another thing whoever you send must be able to stand their ground or they will find themselves enslaved. This due to sizeable number of blood spiders/red sabers/swamp ninjas attacking. There are mods that increase the chance of them joining but I dunno how it works. Never used them. Good luck.