I've been play PZ for... ohhh god... ages. I mean, back before you could 'comfort' Kate with the pillow. And i've had fun. A lot of fun. And i love it to bits! But thats not to say the game hasnt ever got boring. Sure, theres been times when PZ hasnt ever left my mind, and i can't wait to get home and play it, sort my base out, scavenge - but after all that is said and done, when there is nothing else to do apart from farm, of course it will get a tad boring. Thats basically the 'end game' and with no danger from zombies, or running out of food/water, the game becomes less of a zombie survival and more farmville. Thats usually about the time i take a break from PZ. Now, before people attack me, let me say this - I love the game, i really do but the game is in alpha, and as such, its quite easy to get to a point where you can say 'ok, im at the 'end-game'. When i say End-game, i mean you've gotten to a point where theres no more challenge. Nothing more to do, because everything the game has thrown at you, you have defeated, and all that remains is to keep repeating your actions in order to keep that status quo - and that can get boring, sure. But thats why stuff like NPCs are going to be added - at the moment theres nothing really random about PZ - Metagame events, i guess - but if you have seen one zombie, you have seen them all and they're not dangerous unless you do something silly or make a mistake. You can easily build a base, scavenge, farm, and zombies won't bother you (and thats fine, zombies aren't supposed to be smart). NPCs will bother you, and, if TIS can pull them off right, they'll also be random and unpredictable enough to provide a challenge even to veteran players - and more importantly, make keeping the end-game status quo a bit harder to do.