i never played these games but i would like a fun multiplayer experience.   also i know the story of the game by watching my frineds play the other 2.  so my question is this game worth $15 on the playstation store?  (currently disscounted 50% off for playstation plus users)    

or is the online mode full of cheaters and what not online?   (like people who use some weird exploit to kill you etc...)   like will i be able to hide in crowds easily or can they pick out your avatar since im sure you dont look EXACTLY the same as the rest of the npcs?    just sounds like fun but if thats all im getting it for i want to know is it worth it still?

thanks for your opinoons.   

and yes i have read reviews and read multiple comments about the game.   it gave me mixed emotions so im asking the community what they think.    

just rememer its only $15 for now and would like to decide before they remove that disscount.