Can one game still make a difference?

[Frogger]

Hiku said:

I don't think this ever happens, or ever was a thing.
There have been single games that convince people to buy a console, but I don't think people bought the console just to play that one game.

Because you still buy other games later. And you know you will, at the time of your purchase.
If there's anyone who bought a system just for one game and never bought any other game for it, then yes. But I think that's extremely rare for gamers.

But wii sports.

in all seriousness, killer app doesnt mean that its the only game you play. It just means it the defining game for buying that system. I'm pretty sure the concept of a killer app originally came from computers, where they'd literally have applications used to sell their hardware (or firmware i guess). That doesn't mean that someone who bought an old computer for MS Word only used Word, but it would still be a killer app. Even the structure of the title implied that there are non-killer apps in tandem with it. The killer app can easily stand on a foundation of support apps.