I think your overall point of view is pretty much spot on. I believe the first game and the EA was one addiction, and the new game basically just swapped out the addiction. No different than switching from Rum to Vodka. Computer games can be extremely addicting as they essentially light up the same parts of the brain as something like cocaine does. There is a real physiological effect happening.
I struggle myself with gaming addiction. In theory yes I could just play an hour a day or whatever, but one hour can easily leech into 12 for me. My frustration is World of Warcraft. If thats the problem spot for him, I suggest
WoW Detox - The Detox center for your World of Warcraft Addiction! (For the most part I'm better and just trying to throw myself into productive activities. We all have our weaknesses, this is mine.)
Anyway, back to you. This is all a mess. He's not going to change anything without serious intervention I think. All in all he seems to be majoring in Fail. You are completely correct that any children will be raised by solely by you with his back turned and the glow of the screen in his face.
Basically he's failing both Alpha and Beta male metatraits. His overall weakness and clinginess just kills any Alpha attraction, and the lack of productive work ethic and family attention cause by the gaming timesink makes him fail the Beta comfort building tasks. Which makes him Omega...
meaning don't breed with him.
I'd suggest running a Keylogger to find out exactly how much play time is involved here, and if the Other Woman is still in the picture somehow. He needs to be dragged to counseling or something. Or you could just take a sledgehammer to the computer and he done with it.
But yes. His behavior is well below acceptable.