Though you ought to know about this LONG awaited BE Game CrossingGKnighTMarE

[TickTock]

Originally Posted by vakladros

If I can ask, how did you trigger the slaver side mission?

As for beating the boss, I haven't been able to beat any bosses other than mission 1's and the final boss

I can't recall the exact order of events but you need to visit the southern town and listen to their story. At this point you should be able to kill random mobs (Seems to work for the Mercenaries or the minor slaver) and receive a wanted poster of some sort. At this point I ran between the two towns where they talk more about the slavers and you'll eventually see small 4 cart wagons spawn on the world map. One of them is the true target. On my run it was the one by the big lake.

You can defeat the mission 2 slave market boss by freeing all the slaves before fighting the boss. I'm not sure if this requires defeating the Angel side boss that looks like a slave. After touching all the slaves and freeing the dark skinned elf (examine her twice) you'll need to talk to the nun near the start. This should clear the slaves off map and prevent the boss from using them as shields.