Semper Fi Trophy in The Dark Pictures Anthology: House of Ashes
Jason went back for Salim and they both made it to the elevator
How to unlock Semper FiIn the Strange Aeons chapter, regardless of what happens with Nick and the explosives, you'll reach a point where the remaining characters are escaping, and they notice that Salim has fallen behind. When Jason speaks to him on the radio, make sure to make choices indicating that you won't leave him behind. Jason will go to rescue Salim, and you'll need to complete a series of QTEs to make it out alive. Get back to the elevator with both characters and the trophy will unlock.