FPS is "First Person Shooter" and of course it's a genre. It's an action based First Person Game that focuses on shooting stuff. Destiny is also not really a RPG because the classes/subclasses are way too similar and you can't really "choose" your path or decisions. Everyone is the same, you can't be good or bad, you cannot play a certain role. If Destiny is a RPG, "Alien vs. Predator" is a RPG too because of it's three classes. It's also not a MMO because a MMO has way more players in one area than 16 in a social space or 3-6 in a fireteam. Destiny is a normal FPS with a few RPG and (M)MO elements, nothing more and nothing less. Even Bungie says it's NOT a MMORPG so it's really idiotic to compare it to games like WoW or Diablo. The only games that are comparable are games like Borderlands and Warframe...and those have wayyy more content.