Although at least a dozen titles spring to mind, only one manages to outshine them all, and that is the legend of our time that is Deus-Ex. There are simply so many reasons why it's the best game of all time. I've finished it about 10 times now and played chunks of it over countless times. The storyline os one of the most engaging I've had the pleasure of experiencing. The combat is varied, and the interface is easy to use. I could sit for days playing Deus-Ex, despite the fact that I would know exactly what to expect around every corner. I haven't even ever playing it in multiplayer, and it still took up more of my time than any other game (that MIGHT be a lie - Medieval Total War and the Heroes of Might and Magic series come pretty close, as does Counter Strike). The game is in fact so unique that you can complete it by only ever killing one enemy - or all of them. What other action-packed game offers this? (I'm starting to sound like the guy who writes the adverts on the back of the game boxes, so I'll stop )