Metal Gear Solid 4: Guns of the Patriots
The best of the best
Metal Gear Solid will always be my favourite game series, and MGS4 is truly the best in the series, and arguably the greatest game ever made. The series has an incredibly strong and compelling story, and MGS4 concludes Solid Snake's portion of it, and ties up almost all loose ends. The gameplay is perfect: true stealth action, with intresting and unique weapons (an injection that makes enemies go literally insane), simple controls, great hand to hand combat, all with little to no glitches and terrains that are easy to navigate through while it manages to not be too linear. The only thing I can recommend is that you play MGS1-3 before playing 4, because you will not understand a thing that happens, and it will sour the experience of playing the series (PS3 users, you can buy MGS1 from the psn store for $10). By the time you finish this game, manly tears will be shed, and your mind will be blown.