: The main story takes approximately 6 hours to complete, while a 100% completion run (including all Rorke Files) typically takes about 13 hours [13].
: Players must protect a drill as it destroys alien hives. call-of-duty-ghosts-installment-tutorials
Rorke Files are 18 collectible laptops scattered throughout the 18 campaign missions. Finding them all unlocks the achievement/trophy [21]. : The main story takes approximately 6 hours
Ghosts replaced the traditional Zombies mode with , a class-based alien survival mode [10]. call-of-duty-ghosts-installment-tutorials
: You can check which files you have collected through the mission select menu or use video walkthroughs like those on YouTube for exact visual locations. Extinction Mode Basics