Realized Game: I Hoarded 10 Billion Defense Towers

Games of all genres have invaded Blue Star, and the apocalypse has arrived. Secret Realms, Exotic Beasts, Zombies, Demons, NPCs, Potions, and game abilities have appeared in reality. Reborn one month before the invasion, Shen Fei chooses a niche tower defense game and hoards enough power to make a floating fortress city no enemy can breach.