Context: For context I'll start by saying this argument in my mind occurred as a result of playing and beating Undertale's neutral and good endings and wanting to play the bad ending but not morally feeling okay with playing it. I also heavily pissed off my father discussing this as he is a heavily reality-oriented mind, but in the process gained some valuable perspective from him as well on this.
Question: Is it okay to do something wrong if it's in a simulation?
Reasoning: Hypothetically if you had a simulation that mimicked reality perfectly, one would not be able to tell the difference. If this occurred, would that simulation still be a simulation, or would it be reality?
If all the things from reality were in the simulation including all the ways in which one can sense things like pain or complex thoughts and emotions like love, I would personally, be inclined to say that is indeed reality, or more specifically an alternate reality.
Now if it is possible for a simulation to be an alternate reality, then doing something wrong in that alternate reality would indeed be wrong. So we don't get hung up on 'what is wrong' I'll go with the obvious widespread fear, suffering, and death are wrong. Those things for this argument define what is wrong.
So how many features can you afford to take away from an alternate reality, before it is no longer reality and just a simulation such as a video game? If I simply made it so a color did not exist in an alternate reality, would that reality suddenly be a simulation? Presuming a minute adjustment like removing a single color does not make a reality any less real, that would not be the case.
Once it is established there is a grey are where you know there are features that can be removed from an alternate reality without making it any less real, the line between an alternate reality and a simulation becomes blurred and you're left with such ambiguity that even a video game can be considered an alternate reality.
This logic would make a video game a reality in itself, and thus make actions that cause fear, suffering, and death wrong.
Importance: I ask you users to please dismantle this logic so I can play the bad ending to Undertale. I went into Undertale hating Undertale for this specific reason above all others, because the game's character Flowey says it's wrong to take away the good ending the characters have received with the 'True Reset' option you're given upon beating the good ending. Otherwise, if Flowey is indeed right about it being wrong to take away a good ending for these characters since one could argue this video game is an alternate reality, it would indeed be wrong to play out the evil endings in all video games for pure enjoyment's sake.