The factory world of Hephaestus burns. Once a beacon of industry and production is now a graveyard of steel and fire. Endless xeno hordes swarm across its ruined surface, and you command the final stronghold: A lone sentinel tower standing as humanity's last defense against total annihilation. Irongrim Tower is a unique fusion of tower defense and city-building strategy, set in a compelling dark science fiction universe. As Station Commander, you must build upward from a central core, creating a towering bastion that serves as both fortress and city while managing supply chains and defending against relentless alien attacks from both sides. Build Your Vertical Empire • 120+ Building Types across multiple categories: residential districts, industrial facilities, power infrastructure, defensive installations, religious shrines, and specialized laboratories • Build layer by layer, creating a magnificent tower that reaches toward the stars • Underground Expansion- Drill beneath the surface to uncover ancient secrets and expand your base downward