Updated 07-13-2016 07:38 PM
To unlock this achievement you simply need to earn a total of 50 stars across all the different game types. The max amount of stars per game type per map is three. You may also want to focus on the Frontier Defense game type as there is another achievement for getting a total of 30 stars just in this game type. Below is a breakdown of the requirements needed for each star for the different gametypes:
Star Requirements - 1 / 2 / 3
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Pilot Hunter - 5 / 10 / 20 Pilot Kills
Hardpoint Domination - 500 / 1500 / 2500 Capture & Defend Points
Attrition - 25 / 75 / 150 Attrition Points
Capture the Flag - 1 / 2 / 3 Flag Captures
Last Titan Standing - 2 / 5 / 8 Titan Kills
Marked for Death - 1 / 4 / 7 Marked Kills
Frontier Defense - Requirements will vary for each Map