I got this during the sale for $5 and it's already getting boring. I have about 30 hours on this game and there's nothing else to do. I play survival a lot and campaigns are pretty boring, it's just mindlessly killing zombies. Yes I have played expert, it's not really that fun anymore. Anything else to do on L4D2? I have got some mods already, got helms deep, deathcraft, cod zombies.