It takes very little when it comes to running a game like runescape. IF that is all your wanting to do nearly ANY laptop now a days that you can find for sale in facebook "buy, sale, trade groups or craigslist will run it fine. You cannot download anything like games and such to Chromebooks. I recommend searching your local facebook groups, craigslist and especially http://www.newegg.com ...For example here is one that is refurbished, (which would be in better shape than one you could find used off the street in a lot of cases) http://www.newegg.com/Product/Product.aspx?Item=N82E16834264091&ignorebbr=1 Although that would play Runescape just fine, I am not suggesting that you buy that specific one, only showing you that there are a lot of cheap options out there you might also check on http://www.tigerdirect.com stick with a minimum of Dual Core Processing. EDIT: you do not need a desktop to run this game unless you want a desktop..