Imagine this, an MMORPG where the grind isn't about sitting at your computer for hours on end, but not only getting out of your chair but out of the house.
Imagine the concept of a classic MMORPG complete with dungeons, monsters, PVP, Equipment, Shops(both NPC and Player-run), and Guilds, but with the twist of being a GPS-based game where our world is the game's world. You discover dungeons by leaving your house and actually going out into the world. These dungeons by default generate low to high level monsters, which you can either tackle alone or with a group. These dungeons can also be conquered and a Guild Hall/Outpost can be built on top of it. You can recruit other players into your guild and you can all reap the benefits. Guild Halls generate higher level loot that can either be sold to NPC shops or other players.
The range of your attack is based upon the weapon you have equipped. The weapons you can equip are based upon the class you choose from the beginning.