Welcome to WatchMojo, and today we’re counting down our picks for the Top 10 Most Expensive Video Games You Might Already Own. For this list, we’ll be looking at pricey retro games that you may have in your collection. We won’t be including any special editions or games specifically made in limited quantities. Because let’s face it, you probably don’t have a copy of the 1990 Nintendo World Championships just lying around. Also, we’re only talking about American releases of these games.