Following
my realisation that gamers often mistake action for interaction (they usually want more of the former and often don't even recognize the latter), I realised another truth about games. Not all of them are interactive!
Chess is interactive, Solitaire is not.
Chess is interactive because the players interact with each other. The game itself is just an inert set of rules that provides a single output for any given input.
Solitaire is played alone. Against/with a set of rules. Not inter-active. Just active.
Following this, we can conclude that
as games, multiplayer video games like Quake 3 Arena are interactive while single player video games like Red Dead Redemption are not.
As
a simulation, however, Red Dead Redemption is interactive! Your opponents and comrades are driven by AI. They respond to what you do. You interact with them. They interact with you. But they are not playing a game! For them, this is the reality they live in. They only interact with you on the level of this fictional reality, not on the level of the game. In other words: they are
not simulated players.
Strictly speaking, a game with precisely defined rules is never interactive. It can provide a context in which players can interact with each other. But you never interact with the game.