Golden Eye 64 would have to be up there for me, would play for ages just battling it out with my dad. 1v1 facility haha
For some reason Goldeneye multiplayer became a thing that me and my brother would play every halloween. Despite no connection to halloween it remained a tradition for years until I moved out and to this day I bet if either of us were asked what game we would associate most with halloween it would be Goldeneye. I'm sure one halloween in the future we'll decide to get together and play it again since I know he still has his N64 and the cart.