My ally turned into enemy in the battle

[Big-ear Dog]

Does anyone faced it before? Does this make sense or it is an illogical situation?

I was in a battle, I shoot an arrow with a poison potion so it left a poison area.
Then an ally bomb carrier walked in, he exploded and killed every other guys around him (it happened within 1 sec so I am not 100% sure, I was totally shocked afterwards), and all of a sudden, my allies became red and attack my group.

It is very frustrating when this happened in a honor mode game. I can't do anything about it.

[Chaosolous]

That sucks but yeah it happens. Sometimes the AI is brain dead and walks into a hazard only to blame you for putting it there.

[Big-ear Dog]

=== Update ===

Nothing related to players at all
So I decided to continue my broken and in the battle I found there is a bomb carrier goblin. The thing is, he exploded himself and killed others. I guess the ally AI did not prepare for that. I watched the goblin went backward in to an ally form and directly exploded (I do not know he explode by cast or count from 3-2-1) killing everyone.

What a ♥♥♥♥ when it happened in a large battle.

[Big-ear Dog]

Originally posted by Chaosolous:

That sucks but yeah it happens. Sometimes the AI is brain dead and walks into a hazard only to blame you for putting it there.

True, idk why a strategy game hold such an AI.

[Big-ear Dog]

Solution works on me

Your hostile allies are still in the battlefield
I forgot to say how to solve it. Just kill every other original enemies , and move to a off-battle place. The scene will go the next phase for me.
I guess the game will move on once quest objectives are finished.

[Faiaria]

Most of the time, they only turns "temporaly hostile". All you have to do is to turn on your Non-lethal passive before you deliver the final melee attack on those allies. After the fight, go back to camp and then return. They should be back up on their feet again. (There will still be some deduction to their feeling toward you though)

[Big-ear Dog]

Originally posted by Faiaria:

Most of the time, they only turns "temporaly hostile". All you have to do is to turn on your Non-lethal passive before you deliver the final melee attack on those allies. After the fight, go back to camp and then return. They should be back up on their feet again. (There will still be some deduction to their feeling toward you though)

You mean knock them off instead of killing them? Make sense.

[Gregorovitch]

Ally friendly fire issues are common in many games. The reason devs put the mechanics in is that without them players could slaughter allies wholesale in collateral damage with impunity when the whole point of the encounter design is you are getting help from allies you should be honour bound to protect if possible. It makes sense that if you sling AoE's about indiscriminately your allies are going to take the view "with friends like you who needs enemies" etc. If they didn't it would seem equally ridiculous.

The difficulty always comes from edge case situations such as those described by the OP. Genuine "Oops" situations if you like. The way devs implement FF is simply damage done, end of. It's far too complicated and computationally costly to consider the merits or otherwise of "Oops" situations and "OMG! So sorry I didn't mean to do that" mechanics are mostly too easy to exploit and too difficult to implement sensibly.

The issue comes up in X4: Foundations quite a lot for example. In that game there is a "grace threshold" of damage you can inflict on an ally before they turn hostile. However this threshold is easy to exceed and X4 players regularly complain about it. In X4 the problem is that without the FF mechanic it would be too easy for the player to "accidentally" destroy an ally's annoying Advanced Electronics factory station, then say "Oh I'm awfully sorry, but I did kill those Xenon K's didn't I?". Then quietly build a new Advanced Electronics station themselves in it's place.