Playing Videogames that are story oriented but getting extremely restless while playing

Does anybody do this this? Currently I play one (story) oriented game at a time, it drives me nuts but I do it so I'm not left with 10 unfinished games. But what I used to do is play 20 games at a time when I felt like it. I still kinda do it because it drives me CRAZY to stick with just one game, I'm wondering if medication can help this because I would really like to Play Quake without thinking about unrelated stuff or getting off in 5 minutes. If anybody has taken medication and gained lazer focus in their gaming, leave a comment while you're here.