Alien invasion (based on "Crysis" the videogame series)

This is a scenario I made based on the videogame franchise "Crysis" (mainly the first game). Obviously it isn't a 1:1 copy but I took a lot of inspiration from Crysis 1. If you have any suggestions or feedback let me know. Story recap: you were supposed to go to an north Korean controlled island to bring some scientists home but because you got sick you didn't go. After watching the live feed from your team's cameras you realize something started killing them and before you know it most of them died by unknown enemies. As you and the rest of the project staff look through the team leaders feed you see a massive spaceship above the island powering up.