I'd vote for Tetris because it is:
1. the most copied and re-issued game ever. There isn't a system out there you can't get Tetris for in one way or shape, obviously beating out everything else in popularity.
2. Tetris is a 'pure' video game in that it doesn't emulate another game, it is a game made and designed from the ground up as a video game, it can not work in a physical form in any way or shape. Tetris is Tetris. Pong is uber-simplified tennis.
3. It meets all the criteria of the OP (Someone said it doesn't, uhm, yes it does).
Every game has fanboys. They're just not of the 12 yr old shout in your ear type.
Another contender is Snake btw.
Aside:
I don't much like grapes and love wine.
Also:
Keen 4 wooo!