One day, the invaders from the Outer Void descended upon the mainland, bringing destruction and chaos to the human race. Small countries were the first to fall, and people were slow to take it seriously. But the power of the Outer Domain was far greater than anyone had imagined, and soon all the countries on the continent had either surrendered or been conquered. In a desperate attempt to survive, the remaining people united and built a fortress city known as the "Bronze Wall and Iron Wall". This city was powered by the Sorcerer's Stone, and as long as the energy of the Sorcerer's Stone was not extinguished, the fortress would remain standing.

The people thought they could finally breathe a sigh of relief, but soon they received bad news: the largest magic stone energy mine, guarded by a large number of elite knights, had also fallen. Your father, the lord of the fortress city, died in this battle. You had no time to grieve, as your secret intelligence department had brought you a piece of news: two traitors had been hidden in the Knights, and their betrayal had led to the fall of the mine.

The remaining energy was only enough to power the fortress city for seven days. After that, the Outland Void would attack aggressively, and you had to find the traitors before then. The internal and external troubles were the greatest test for you and this civilization.

The Knights were the members under your command. They were the strongest combat force on the continent, each with their own magic weapon and honed skills. They had always been the hope of the human race. But now, could you still trust them?

You had seven days to develop the fortress city and prepare for the challenge. Every night, the void tribe from the outer domain would come to invade. You tried your best to hold on to the fortress, but you still made mistakes. You had no clue about the traitors lurking around you, and the void was far stronger than you expected. You lost the battle with the "judge" of the void clan...

But then, something miraculous happened: you were reborn, and you went back seven days in time. Everything started again, and you had the chance to make up for the mistakes you had made. However, the timeline seemed to be a little different, and every cycle something new happened.

Finally, after many cycles, you found out the traitor's identity and defeated the Void King. But the cycle didn't end there. Everything was back to the beginning, and you seemed to be cursed. You tirelessly guarded the last bastion of mankind time and time again, until one day, an accident made you discover an item that should not exist in this world. You connected the previous clues, as if you had discovered the truth of this world!

At last, you met someone. "You're still here." "Time and time again, the world you guard, actually..." "Destroy it, end here..." What would you choose?

• OS: Windows XP, Vista, 7, 8/8.1, 10
  
• Processor: 2.0 Ghz
  
• Memory: 2 GB RAM
  
• Graphics: 1Gb Video Memory, capable of OpenGL 3.0+ support (2.1 with ARB extensions acceptable)
  
• Storage: 1 GB available space

• Storage: 3 GB available space