What game or games do you wish you could have a memory loss on so you can play them again and enjoy the experience?

The Half Life 2 series is the one for me. When I asked my Brother in Law if the episodes were worth buying and playing he said I was lucky not to have played them yet and he wish he could.

Fez, and the first three Phoenix Wright games. Braid. Limbo. Basically, any narrative-based puzzle game. I went back to Braid two or three years after I played it the first time, and still remembered the solutions to most of the puzzles. It became more about performance rather than exploration and experimentation.

Perhaps Sonic 3, as I've played that game so many times that its maps are permanently etched into my brain.

Super Mario World, A Link To The Past and Shadow of the Colossus comes to mind. Oh, and Silent Hill and Silent Hill 2! :)

Final Fantasy V.

With a small exception i only keep games that I've enjoyed, so I'd probably have say my entire collection for maximum entertainment. Only catch is its over 200 games, so probably over doing it slightly!

I have a very annoying tendency to stop playing games I like especially much. Same goes for films and TV. My reasoning for that is that I'm saving them for when I have the time to fully enjoy them. I mean, really consciously enjoy every last bit of them, exactly to prevent the kind of thing that you are asking about ;)

I'm working on it!

But as for the original question, I'd probably choose some games from the very early days when I just started to get into games. Those are the ones that can leave the most lasting impressions on you, aren't they? So I'd probably go for titles like Little Big Adventure 2, Lighthouse, Normality, 7th Guest, to relive that wonder. But it probably wouldn't be the same anyway.

I also wouldn't mind rediscovering the worlds of Grand Theft Auto, Dark Age of Camelot and Gothic all over again.

Silent Hill 2, hands down. I would have liked to come fresh to it to experiment each one of the endings (especially "Maria", which is my favorite one).

Sands of Time would be another one, I'd like to know whether I would find the ending so moving now that I've become such a jaded old sack.

And Fallout 3 too, I had such a blast exploring the world and finding all the unmarked quests and little pieces of backstory, and then coming back to it experimenting with all the awesome mods. I spent over a year playing it almost exclusively, and I don't remember when was the last time I'd done something like that. That game was like tailor-made for me.

Funnily enough, the opposite thing happens with Bloodlines: It's most likely my favorite game of all times, but I don't care about knowing everything about it already, I actually enjoy it more like that --I can re-play the same quests and listen to the same dialogues over and over again and I never get tired of it (well, with the exception of the sewers, probably ¬¬). Some of the dialogues I even enjoy reciting in my head while I listen to them again. And in fact, knowing it all beforehand makes me want to try different things every time, so in a way it's even better.