Mission 11 Of Their Own Accord
Near the end of the mission, you will acquire a Javelin rocket launcher to destroy helicopters and tanks. You'll also be required to utilize a sniper to eliminate enemies. Continue to use your Javelin first to destroy all of the helicopters you can during this section. Then after the sniper section, a timer will begin to exit the area. Ignore this timer and reequip your Javelin to destroy the next wave of helicopters that will spawn in. Reload checkpoints as needed.
Here is a video guide with English commentary!
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