There's any number of situations for this. If it's not just letting a kid die or killing a kid, it's those crazy situations where someone died because they couldn't stop playing games. They played for like 3 days straight hopped up on nothing but junk food and energy drink and then died because their body couldn't handle it. I think your video game love has hit the bad point way before something like that, but those are the pinnacle of extreme examples.
A more realistic thing would be like if you are missing work or events because you are gaming, you haven't left the home in awhile, eating well isn't being considered, you are spending all your money on games and nothing else to the detriment of your living situation, not being able to play your games becomes a serious issue to you, these are all more common things to see for sure.