(Saw this question asked on another popular link aggregation website and it got me thinking)
If you could play one game for the first time all over again, what would you choose? This might be because you want to do it all again, or because you don't think you got enough out of it the first time. It could be experiencing the game exactly as you were back then, or experiencing a game with what you know now.
For me, it's Legend of Zelda: A Link To The Past, experienced exactly as I was back in 1991.
Nothing comes close to how jaw-droppingly amazed I was by that opening sequence. The epic orchestral score, the cinematic rainstorm, creeping around in the dark... it was a generational leap above anything I'd played on 8-bit computers and consoles, and even the Megadrive. I'd love to play it again without thirty plus years of Nintendo/Zelda knowledge, or without knowing about the dark world.
Monkey Island or Little Big Adventure
First thing that popped into my mind too. Monkey Island, Loom, Zac McKraken, and all the other LucasFilms (but even after they rebranded as LucasArts) too.
Indiana Jones and the Fate of Atlantis is still my favorite point and click adventure. Purchased it three times too: on floppies when it came out, the enhanced *talkie *edition on CD, and then on Steam when it came out.
Indie 4 is on steam? <3 I wish they had that movie instead of the stupid "we don't talk about it" fridges protect you from atomic bombs one. Also, I wanted to ship a big-screen Sophia Hapgood!