Empires & Allies – Why do I see three different variations in the Gunship X-250 and how do I earn it?

Gunship X-250 boost is earned by collecting Stars in Operation Hammerfall. Once you earn the required number of Stars you will receive the Gunship X-250 Boost.  

Earning 20 stars unlocks Bronze Gunship X-250 that is available for 15 minutes on usage.

Earning 40 stars unlocks Silver Gunship X-250 that is available for 1 hour on usage.

Earning 60 stars unlocks Golden Gunship X-250 that is available for 3 hours on usage.

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Empires & Allies Game GUIDE