System: the Dual Identity of the Strongest Demon King

Introduction: end of 21st century The third generation holographic online game developed by Renwoyou Company! Doomsday Fortress is officially online! "In Doomsday Fortress, players will descend on the human city "Winter Source City" and follow the game NPCs to protect the last hope of mankind! There are both modern hot weapons and cold weapons, and AI also has the same autonomous capabilities as real humans, allowing players to experience the real game world environment." Wrote Doomsday Fortress! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.