Getting those special endings really comes down to how you handle your crew's personal stories, and its worth putting in the extra effort. Karlach can actually survive her whole engine situation if you convince her to face avernus with backup, while gale might end up as either a fancy ghost or straight-up god depending on what you do with that crown of karsus stuff. Pretty interesting actually, astarion gets completely different scenes based on whether you let him go full vampire lord or keep him as a spawn, and shadowheart either ends up running a farm or leading some dark religious group.

Maybe interesting that you can mess everything up by starting fights at the epilogue gathering, withers just sends you packing through a portal if you try. dark urge players get some extra weird stuff too, especially if they went all-in on the whole bhaal thing. The game tracks basically everything you do, so those final scenes can play out thousands of different ways, just make sure you wrap up those personal quests before the finale or youll miss some of the best stuff.

Tip for completionists: check in with companions regularly cause some stuff like minsc's recruitment and volo's whole manuscript thing can slip right by if youre not paying attention.