Apply Murphy's Law to video games.
"Anything that can go wrong will go wrong."
1): The power up you've been waiting for will not activate until all the mobs are dead.
2): The hostages you are rescuing are suicidal and will jump into every mob before you and get between you and the mob.
3): Otis will call while your fighting a horde of zombies, and then scold you for being rude and hanging up on him.... Even though he can see you through the security cameras he sees the other survivors through.
"Anything that can go wrong will go wrong."
1): The power up you've been waiting for will not activate until all the mobs are dead.
2): The hostages you are rescuing are suicidal and will jump into every mob before you and get between you and the mob.
3): Otis will call while your fighting a horde of zombies, and then scold you for being rude and hanging up on him.... Even though he can see you through the security cameras he sees the other survivors through.