What was smart asssed, or rude, about it? That's what those games are called. GoldenEye was multiplayer. Halo 2 was online multiplayer. If you were asking what to call a game that has P2P multiplayer support using webrtc and therefore only supported countable concurrent players, my honest thought would be to call it an online multiplayer game and forget about the "massive" part because it's just not relevant. Even though it is meant to mimic the gameplay of games that happen to be MMOs doesn't mean it needs to adopt the moniker. Final fantasy 12 mimicked the gameplay of MMOs, but it's just a "single player game".

On the contrary, if you're trying to convey to a mass audience that what you have built resembles something else, the best strategy is to reference that thing by its most familiar name.

Sorry if I came off as petty. Was just trying to answer honestly, and realized I didn't have the right context.