Shooting Hidden Enemies
Some enemies hide in areas where you cannot shoot
them. Throw a grenade at them and they will jump
out of hiding. When they jump out, they will land
on the ground on their stomachs. They will require
a few seconds to get back up. Before they do, aim
and shoot them or they will go back and hide again.
When your mission is to evacuate the Oil Rig,
there's a room that you pass through that has a
first-aid kit in it that's pretty easy to miss.
Okay, I'm pretty sure that it's the second room
room. After you get the grenades in the room with
the elevator, you pass through a room with like
25 soldiers. After you kill all of them, there's
a walkway to a room with only one soldier in it.
THAT'S THE ROOM!!! Once you've killed that
soldier, look to the wall that's was to your left
when you entered the room. There should be a
First-aid kit there.