Really surprising i never answered this thread, considering how much i game...
It would be very hard to pick ONE game to be honest, i game since i was not even 5 years old and played every generastions from the NES (commonly refered as "Nitendo" by our parents back then haha) til now. So im gonna put my top 5 favorite franchises instead. Even that will be hard...
1) Gears of War
I play it since 2006 and even tough my fun ain't exactly the same after all these years as back then, especially since most of my former teamates do not play anymore, im still having fun on the game. As a team we used to dominate the online back then and this is memories that are priceless. I do enjoy the story/campaign and the lore but mainly Gears for me is online VERSUS multiplayer.
2) The Elder Scrolls
I never played 1 and 2 as they are old PC games, but ever since 3 Morrowind i have enjoyed those games so much...
3) Resident Evil
There have been ups and down but i had fun with most games in this franchise, and considering it has been running for so long, its bound to change. Unlike poster above me RE4 is not my favorite at all, its actually one of my least favorite, i prefer the older games (RE1 remake, Code Veronica etc)
4) Shenmue
Especially number 2. Such a great saga created by Yu Suzuki. I have yet to play 3 even tough i have my copy on the shelve since the release... but im waiting on the perfect moment to get into it, when im not focussing on anything else.
5) Bloodrayne
I have fallen in love with this game when it released, i must have played Bloodrayne 1 around 7 times then, and probably 12 times by now. I made a full playtrough last year once again. I always wished there would be a proper BR3. Bloodrayne Betrayal altough a fun game in its own style was not that number 3 i wanted.
Yeah, was kinda hard to let out GTA, Dead or Alive, Mortal Kombat or even COD... Altough im not a fan of every games, i have fond memory of the OG MW trilogy for campaign and the first 2 Black Ops for MP. I also had to left out old classic games like Contra and such...
It is what it is...