the first 3 original spyro games are available on the playstation network 5 bucks each. they are pretty bad ass.
madden 12 is a must buy if u are a football fan.
battlefield 3/mow3 is a must buy if u are a fps fan. bf3 owns mow3
skyrim and all assassins creeds = the shit as a rpg
you might want to consider buying a secondhand j-tagged system if u play offline only also. google why.