Ghostkai said:
Whatever the hell Planetside was classed as.
According to: http://en.wikipedia.org/wiki/Planetside
it was an MMOFPS.
Personally, I would combine RTS with FPS, but there is no real reason why you can't give your AI controlled members of your side stats, so it is also an RPG...so that would make my ideal game:
an MMOFPSRTSRPG.
A
Massively-Multiplayer First-Person Shooter Real-Time Strategy Role-Playing Game.
I'd like it to be the size of a Universe, with non-screensaver EVE-Online space battles and the ability to land on the planets, where jungles would look like Crysis and be made of procedurally-generated fractal exo-botanical plant species in a simulated holistic ecosystem that was dependent on the atmospherics and soil chemistry.
The game would let its players colonize new worlds and post them on the internet on a distributed network of websites. So, when you came out of Hyperspace into an alien solar system, most of the planets and moons would be predetermined by their Universal position to have some consistent characteristics (and not require any storage at all, a technique used by Elite), but then you would find the odd asteroid, moon, or planet that had been colonized by another player, with their choice of architecture, or ruined archeology.
This leads to a problem: No one is going to want to do all the hard work of creating a civilization with a kind of SimCity gameplay and put it on a public web-server to be nuked by the first deep-space battle leviathan that comes along.
However, this problem has already been addressed by MMORPGs where the same dungeon can be used for quests by multiple adventurers and not run out of monsters and treasure - it is called Instancing. Essentially, all this means is that the creator of the planetary civilization publishes a constant template which others then create modifiable instances of on the same server (or just simply download as they slowly fly into the planet from the outskirts of the solar system, where their Jump-drive had deposited them). As space is Player versus Player, you can have situations where you are exploring new territory in your trading ship and discover two alien armadas fighting it out over a point of strategic importance. To keep things simple, there would be an explorative/civilization building/archeological mystery adventure game for pacifists (although, depending on difficultly level there would be some computer controlled AI opponents, but player death would just put you back to the last place you had used your Jump drive - enabling you to reconsider your destination), as well as a "Galactic Deathmatch" where everyone and everything could be destroyed, but actually it was only a copy of the user created civilization that got nuked/invaded.
Oh, by the way, to stop new players from having an unhappy time from experienced well-resourced players, small vessels can be fitted with Cloaking devices, rendering them completely invisible and undetectable to sensors, yet unable to fire when this technology is engaged. Big ships are too large to Cloak.
see: http://en.wikipedia.org/wiki/Instance_dungeon