Credits To PowerPyx For The Vid


In the 9th mission "Dark Heart" you will come across an alien structure coming from the ground,
shortly there will be 2 aliens and a sinkhole in the water.

You need to grab an alien by holding [] Square and throw them off to the sinkhole by pressing R1
and the trophy is yours.

Also using cloak is a must here to remain undetected to easily throw an alien off without notice.