Each campaign level has certain requirements in order to unlock the Gold Rank for that level. Here is a list I’ve compiled of the requirements for each level to attain the Gold Ranks.
Mission 1 Alpha Base – Get more than 27,000 points in 5 to 12 minutes
Mission 2 Relic Approach – Get more than 70,000 points in 15 to 30 minutes
Mission 3 Relic Interior – Get more than 45,000 points in 8 to 18 minutes
Mission 4 Arcadia City – Get more than 50,000 points in 21 to 23 minutes
Mission 5 Arcadia Outskirts – Get more than 40,000 points in 21 to 23 minutes
Mission 6 Dome of Light – Get more than 45,000 points in 15 to 30 minutes
Mission 7 Scarab – Get more than 32,000 points in 12 to 24 minutes
Mission 8 Anders’ Signal – Get more than 30,000 points in 18 to 30 minutes
Mission 9 The Flood – Get more than 35,000 points in 18 to 30 minutes
Mission 10 Shield World – Get more than 55,000 points in 23 to 32 minutes
Mission 11 Cleansing – Get more than 30,000 points in 23 to 30minutes
Mission 12 Repairs – Get more than 32,000 points in 10 to 20 minutes
Mission 13 Beachhead – Get more than 40,000 points in 20 to 60 minutes
Mission 14 Reactor – Get more than 30,000 points in 15 to 30 minutes
Mission 15 Escape – Get more than 30,000 points in 20 to 33 minutes
