User blog comment:Uselessguy/Guess Plants or Zombies in the whole series/@comment-25154254-20141024025613/@comment-8635221-20141026072725

The fact that Adventure Mode never ends?

The fact that the current world in PvZ2 isn't the final world?

The fact that Dr. Zomboss keeps coming back with more Zombots?

The fact the zombies never give up?