戰功目標達到了50以上Each scenario has three targets. You must complete the required number of unique targets to unlock the achievement. You do not have to complete all 3 each time you play the map, you can complete each target on seperate attempts and they will count toward the total completion. You can see your progress on these by opening Free Mode and scrolling through the maps. To do these quickly, you can play a high level character on Easy.