since 2008 when i actually officially retired my ps2 and bought ps3, my top lists have changed alot.
it was assasins creed and gta 4 for some time then it was dead space and uncharted 2 for sometime i remember in 2010 it was red dead redemption and god of war 3, MGS 4 was a disappointment for me.
but as new playstation is around the corner and hopefully next year almost all developers will start developing games for new consoles.
but as of now i think the greatest game of this generation is Batman: Arkham City.
i know gta v is & arkham origins is due in september 17 and october 25.