As Andrei Volkov aptly put it
Actually, when it comes to karma, "subtle" does not mean "weak". Some of our deepest hung-ups come from our subtlest preconceptions.
There are already plenty of answers on this question, but I felt the need to add my two cents, as my view on this is slightly different.
In Tibetan Buddhism there is an emphasis on purifying ones karma.
In a common mantra
OM AH HUM is contained within it a load of symbolism and varied traditions.
The order in which to purify ones behaviors was in these 3 syllables.
OM - Body
AH - Speech
HUM - Mind
Within these 3 "bodies" as they referred to them, one must purify the actions of...
The body is considered the easiest of the 3 to control.
The speech the second easiest.
The mind of course, is the most difficult to master.
The kind of karma that video games would create, if any, would fall under HUM.
Except some fringe conditions of course, like if you swear at relatives when you miss a re-spawn point. That would fall under AH.
If you punch your dog because you got head shot in match of Call of Duty, then that would fall under an action of OM.
If those prior two examples resonate with you, you might want to take a step back to the basics.
If however they do not (I will just take your word for it) you might be concerned with the subtle aspects of mind.
In which I would argue that video games can be used as a tool, just like any other tool.
Roleplaying games allow you to see your mind act as if it would if you were in situations you cannot be in within real life. If you observe your mind while you play, in a way it could become a kind of meditation.
If for example there was a hypothetical video game called "Bodhisattva" or
"Monk" where one played those roles. Bodhisattva would essentially be the opposite of Call of Duty, think magical monks running around blocking bullets. (Keep in mind this is a hypothetical)
Would these games have benefit ? Depends on who develops them.
But all this brings me to the point I want to make. A game like Bodhisattva is just simulation. You aren't saving lives, you are pretending to do so.
Same with Call of Duty. Doing and pretending are not equal.
In fact if playing GTA is the worst thing you have done in your life, your karma is quite nice in comparison.
So let's be reasonable, yes there is an influence that like any other art form, book, music, painting, etc will have. However Buddhism is about neither acceptance nor rejection. The dharmakaya as described by Chogyam Trungpa is what I refer to here.
The video game is empty of any inherent being. Our interaction with it is what we must watch. The video games influence on you might be null, it might be vast. You must be aware of what influence it has on you. The karma that you reap from those moments could be good or bad. Your reaction to it is what matters.
In conclusion I will more directly answer the 3 questions you asked:
How close are all these actions in a virtual reality to actions in a real world from a Buddhist point of view?
Slightly reworded your question, but the answer is they are not close at all. Those scenarios would require action of body, speech, and mind. Doing them in real life would have much vaster karmic effect.
Yes, I do not do them for real, but I still make these choices using
my free will. So is it the same if I did all this in real life from?
It is not the same.
Are they bad for my karma?
It really just depends. There are so many factors, the game, your thoughts while playing it, and the influence it has on you. If you are playing Professor Layton games, I'd say the answer is most certainly a no.
Call of Duty is more likely a yes. But it is still not necessarily so...
Bottom line / TL;DR : Analyze your life before your video games. Changes there are more likely to have karmic impact. But do not deceive your self, if video games are part of your life, you must include them in the analysis.