Get certain overall percentages on each Campaign to unlock the Bonus Missions.
Unlockable How to Unlock Bonus Mission 1 Get an overall of 85% on the first Campaign Bonus Mission 2 Get an overall of 85% on the second Campaign Bonus Mission 3 Get an overall of 85% on the third Campaign Bonus Mission 4 Get an overall of 90% on the fourth Campaign
Contributed By: papercup.
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