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The Upgrade Center was a platform constructed to accommodate the rising sophistication of GDI equipment with powerful mainframes and databanks installed within, as well as two upgrade platforms that accepted a number of units, which determined the functionality of the structure.
A Seeker control upgrade unit was responsible for assembling and releasing Hunter-Seeker droids. Another unit was the ion cannon uplink, which allowed to call down an ion cannon strike. Third possible upgrade was the threat rating node, which assessed enemy threats and coordinated the base defense grid.
Another upgrade was introduced shortly before the Firestorm Crisis. The drop pod control plug allowed for interfacing with space stations located in lower orbit and the GDSS Philadelphia to call down drop pod reinforcements. Eventually, the functions of the building were taken over by two other, more specialized buildings (the space command uplink and ion cannon control).