I just recently noticed that I've never played a proper Sims game. I only ever played Bustin' Out on the GBA, which was awesome, but it's not in keeping with the rest of the franchise. So what about you? Any franchises you just never played?
Never touched The Sims or Demons/Dark Souls over here. Hadn't actually touched either Portal game until this week, where I was totally entranced by the first one and played it in one sitting. I don't know if you've heard of this Portal thing, guys, but it's pretty good!
Every other major franchise in the history of man, I've had some experience with.
Anything Nintendo, Mario being the standout. I always feel confused when people talk about all of Nintendo's great franchises and characters, none of them look in the least bit interesting to me and without the nostalgia other people seem to have have for them, Nintendo hasn't done anything worth caring about since the launch of the Wii.
Let me show you my list: http://www.giantbomb.com/profile/schatzy23/landmark-games-ive-never-played/46-74232/
Tenchu, Monster Hunter, Unreal Tournament, Shenmue, Gran Turismo, Neverwinter Nights, literally any space flight sim, or significant amounts of Sly Cooper, Tomb Raider, Deus Ex, or Forza Motorsport. If Arma, Metro, S.T.A.L.K.E.R. or Company of Heroes count, I haven't played any of those either.
Is it weird that I entered the thread just thinking about Tenchu? Is Tenchu any good? Jeff said on an old Bombcast that the original Tenchu was good, but that was about it.
I thought I'd commented on this before...
Anyway, I've never played a Silent Hill game, a Tenchu game, Boktai, a Tales of ___ game, a Mana game, Earthbound, Metal Gear Solid, Shenmue...
...yeah, I can't think of much else. There are already some "cult classics" on that list, and you could probably dig down and find some cult series that I've never touched or even heard of before, but generally, if it's even remotely well-known or well-regarded I've played at least some of one of its entries.
I've never played a Metroid. I would really like to get into the series at some point, but with each new release the prospect becomes more and more daunting.
You can skip the first and second games, the two DS games (Pinball and Hunters), and Metroid Other M. Zero Mission and Fusion are good, but not necessary. Neither are the latter two Prime games. Which leaves Super Metroid and Metroid Prime (two of the best games of all time), unless I'm completely missing something.
Honestly, the Metroid games have a storyline and continuity, but you could pick up any one of them and not need the others to know what's going on and, really, the story is not the reason to play those games since, in most cases, it's pretty minimalistic and in the background.