The file
The game that brought arcades back from the dead. Before it, you played alone against the machine; after it, you put a quarter on the marquee to call next, and the kid who could do Ryu's fireball on demand ran the room.
Champion Edition, Turbo, Super: Capcom updated the cabinet for years and every one earned. Street Fighter II is why the '90s arcade existed, and why it sounded like Hadouken.
Sources: Wikipedia — Street Fighter II