Well this has backfired horribly. I was attempting to gather information on exactly where the line was for them, not spark a debate on the topic. I think it’s safe to say that it’s at least a little bit a subjective term in certain contexts. Yes it can be taken literally and as soon as you have two players involved, it’s technically multiplayer but we often used terms to describe games that fit into general genres that aren’t quite literal.
Take ARPG for example, it’s a different genre than Action RPG even though ARPG means Action RPG. These subtle differences in terminology tell us a lot about the game. In this case, most notably, the camera angle is generally completely different.
I’m sorry to have thrown this so far off topic.