I am looking to use gamestops b2g1 his weekend, looking to get unit 13, SH:BOM and Lumines. My understanding is if you buy used games, you have no access to online (content/MP/whatever), is that true and to what extent does that apply? Does it apply to any of the three games above? And, if buying from GS, can I ask them to provide the online code? And finally, if buying used and there is a code inside the box, can I use that or is there something I need to know/ask before I can or cannot use it? thanks!