In USS Callister couldn't he just get thier DNA again?
Their whole big plan was to get all the DNA he had of them from his fridge so he couldn't re-upload them into the game ever again. Now they didn't count on him getting stuck inside the game from the beginning, so their original plan was just to steal the DNA from his fridge and kill themselves.
I just found it funny not one of them brought up the fact that he could just get their DNA again anytime he wanted.