HQ Upgrade Planner maps the building route to your next Headquarters level. 1. Open Tools and select HQ Upgrade Planner. 2. Choose your current HQ and target HQ. 3. Review every prerequisite building between the two levels. 4. Enter or compare the required resources and time. 5. Save completed levels as construction finishes. Use the route to prevent a secondary building from blocking a planned HQ upgrade. Confirm live costs before a major spend because patches can change requirements.