Here's a distinction, games won't kill you if you suddenly try to quit.
True, but like I said, that doesn't necessarily define addiction.
Coffee won't kill you if you suddenly quit.
Neither will gambling.
Actually, now that I think of it, suddenly quitting many of them will keep you alive, like smoking.
As soon as you stop smoking your health immediately
begins to improve.*
*this doesn't take into account when, during a nicotine withdrawal induced rage, you tell the leader of the biker gang that he's "a fucking pussy" and needs to "go fuck himself". The resulting ass kicking you get can technically be seen as a result from quitting smoking.