On the 3rd day of the arena (gladiator fights) event, during the first battle, at turn 5 the game always glishes, the 2 archers disappear, I can't click on the levers anymore and some off the hexes are no longer accessible for me to move on. And this has happened half a dozen of times. How am I suppose to finish this fight?

I played through Blackguards several times and this never happend to me..but i didn't tried out the expansion.

So it may be a bug caused by the expansion, aside from this you can only try the ususal thinks checking the integrety, reinstalling the game, checking the drivers,defrag...and if nothing else helps...try to write a mail to the support.

OK I'll try that thanks.

It's possible to 'finish it' anyway even with this horrible bug by positioning your characters correctly so they can hit the enemies before they become unable to move thanks to the bug. (the archers since if others bug out they come to you into range).

You need to target the enemies on the overlapping 'teleported hex' on the foreground of the battle, they're slightly to the left of the front of the battle field.

What a bug eh?

I counsel you to move magic users/bowmen into range of the archers.
This game could really use a alternate targeting mode using portraits, clicking on them already centers the camera where they're supposed to be (not with this bug), it would be a small extension to make it use a attack if clicking with something selected as attack mode/icon.

BTW, i played this on wine, so i was wondering if it's the same to you and a problem that only occurs there or is it general to windows too?

I'm having the same problem. No matter what I do, the archers (and even Niam!) all move to the same hex off the map and then none of my characters can move anymore. It's happened ten times in a row. I have managed to pick off two of the archers, but the third one is impossible to target. This is pretty much the epitome of a game-breaking bug. I've tried uninstalling and reinstalling everything, and it hasn't helped. I'm just glad that it's within the 30-day GOG refund window :|