I figured it out. The hardcore love toys and stories, casuals love games.

[Pyro as Bill]

Metallicube said:

But single player gaems, or "toys" as you call them, still have a set or rules, and a way to win (or at least "play for a top score). That to me is what defines a game, not the fact that you compete against others.

Playing for a top score is when it becomes a game. Toys can have rules. You're talking about challenge not competition.