I hope act 2 has a sewer where you can side with mutants
Well mutants? I doubt that unless you count as undead Zombies or something like that or maybe a meteor has fallen and some monster are mutated a Pen and Paper adventure had mutated Wererats.
If I remember correctly Pillars of Eternity 1 had that you met with a poweful undead in sewers but instead of attacking you could make a deal to be on then undeads side instead and do some mission that the Undead wanted. I killed the Undead but option to play as Evil fine yes go and implement it. This game probably often gives options play good or evil or neutral.
Please note I do not have any information on this. I do not know what will be included in act 2.
