Dunno. Maybe further west. I've been in the North and South and really only heard addictive.

That said I don't play videogames and haven't for over a long time. I remember the site addictinggames.com. I think it easily could be a videogame dialect. Remember way back when I was a kid my mom would bitch that I was addicted to certain games. It's been well documented as addictive. Easily could be clever marketing from game companies to create a word. It also could be intentional slang to mimic kids misspeaking and it caught on.