Royal Defense: Zombie War is a thrilling game that takes you to a post-apocalyptic world where zombies have almost wiped out all humans. As a survivor, you are tasked with rescuing other survivors from the siege of the zombies and protecting them, establishing the final shelter of humanity. The game is available on Android platform and is free to download.

The game is all about arranging the turret defense line, defeating the invading zombie army, and collecting gold. You need to upgrade turrets, strategically match various turrets, and defend against different zombies to survive. The game features multiple bosses that you need to defeat to unlock more advanced weapons and technology. One of the unique features of the game is that even if you close the game, the turret continues to guard the shelter and collect gold. Don't forget to come back and upgrade them.