Critical Dawn

Aliens have planned against us for centuries... And now the attack is ready. Charlie Jackson's archaeological team find advanced technology in an undisturbed 16th Century graves. While investigating the discovery, giant sinkholes appear across planet, marking the start of Earth's colonization and the descent of civilization. Charlie, and the rest of humanity will have to fight for survival, sacrificing the life they've known to protect themselves from an ancient and previously dormant enemy...