As an aside, you might want to read up on "My Guy Syndrome" and why your decision was a bad one even in terms of gaming.

You cannot really prevent a spillover. Apologize and avoid RPG with a group you have to work with on daily basis in the future. Ah, and unlike Chess and similar, this is not a zero-sum game, so it is in your hands how you handle the meta-levels that automatically emerge here.

At first, I misread the title as "I've killed my colleagues, now they won't talk to me", and was wondering if you had telepathic powers. ;-)

@JoeStrazzere In the case of tabletop RPGs, there are written rules and not written rules. One of the usual not written rules is that you don't kill party members if they're not ok with it. I'd partly place the blame on the DM for not preventing this, but not on the other players. Some people (myself included) spend hours and hours building their characters, and killing them WILL cause bad feelings.

@JoeStrazzere I guess you don't play pen-and-paper RPGs. What he did was way more out of line than breaking rules. I'd compare it to cheating in a poker game for pocket change. It's not about losing 0.99$, it's the fact that a guy would cheat to get 0.99$ from me that makes him a persona-non-grata. I don't think it's childish to feel betrayed (being it money or time) when you indeed were.

@nvoigt - it's not important. While it looks foolish on both sides to me, you know games more than I do. I've deleted my comment.

It's telling that you're still not seing what you've done. It doesn't matter if you think the incident is unimportant. It's like saying it's okay to cut somebody's arm off, because it's not your arm, and you don't really care about arms anyway. Other people have different values than you do, and all you've shown so far is that you have no respect whatsoever for the things other people value. Are you really surprised they don't want to hang out with you? I wouldn't. Understand what you've done. Apologise. Don't make up excuses and reasons why "it doesn't really matter". Be an adult.

Note to myself and to you too, don't participate in zero-sum games with co-workers, no matter how appealing they are. It's easier to play with actual friends, because they'll probably forgive you, and you won't be as troubled if you lost them (at least you won't see them again). With colleagues, stick to games that are purely for fun, like super smash bros or something.

There is a reason for Evil alignments being a thing not recommended for newbies. It's too easy to kill a game if you don't play them right,, and this servers as a good example to it.

You find it childish? Imagine what they might be thinking of your killing move (in the best case).

If this were in the Roleplaying Stack Exchange I'd say that you did NOTHING wrong, given that the DM allowed you to play a Chaotic Evil character, and that's exactly the sort of plot twists that you get with evil characters. However for Workplace, the lesson here is that its kind of risky to play emotionally driven, personal games like D&D with your coworkers unless you know them really, really well.

Why did you think playing an evil character would be a good way to bond with your coworkers? Especially when you're new, all activities with your coworkers should be about building trust. Your coworkers don't like you now because you've shown yourself as willing to betray them in a game for no apparent reason other than your own amusement.

Some words come to mind: selfish, immature, and oblivious. Go apologize. Maybe one day they'll even let you play another game with them.

Its a really dumb idea to abuse your coworkers directly in a game. Its not supposed to matter, but its kind of asking for trouble. Video games are one thing, but people invest a lot of time and energy into their role-playing characters.

It doesn't necessarily sound like MGS - that's often used as an excuse by the unimaginative to call ANY case where a player plays as anything other than Shallow Teamplayer-y. The good comments here are Graham's ("gotta know your coplayers" - yeah, some just want a predictable Skinnerian game, and - danger - many don't really get the idea of roleplaying) and Myles' ("and then what?" - e.g. ""some of us were unhappy with the chargen choices, could use the excuse to reroll", maybe?)

@Graham It would be very controversial even over at RPG.SE.

That is a game, if you could kill you colleagues characters you did VERY WELL, at least you know now with what type of unmature people you have to deal with. Indeed I would go further more and make fun of them for behaving like 10 years old child. Such persons are very easy to manipulate

Honestly, this is the gaming equivalent of being invited to go see a movie and then spoiling the movie's ending 15 minutes in. And then thinking you did nothing wrong. It's just a dick move and acting like "it's just a game" is showing you don't get the whole idea of a social game.

I'd ostracize you too, why include someone who intentionally dismantles what others are having fun with? You undermined something others invested time and emotion in without remorse or guilt for the action, and I would expect you to do it again as you seem more interested in calling them childish instead of understanding them. You were invited to a game of football, destroyed the ball infront of them all, and then post on here they are childish for not wanting to include you again.

@kaay I don't know if I'd bother rerolling... I mean as a player why would you reroll to be in a party that includes Murdery the Party Killer again if you are not interested in non-cooperative play. If nobody else is interested in rebuilding the party around him then it forces either a ret-con or a restart. Yet another winning argument after the fact for the "Same page" tool.

@Myles The reroll scenario was merely an example for an "and then what?" that might justify the action. You read too deeply into this. But yes for the Same page tool.