Once inside, tackle the Beserkers, and then turn to the left and shoot at the gray crate to disembowel the guards. If you didnΓÇÖt blow up the explosive containers, then push one of them close to the upper ledge and hop up. If you did destroy them during your bullet exchange, head back outside and look down to the walkway on the right where the guards were. Jump across and climb the stairs and exit the door with the Invulnerability symbol on it. You are now on the elevated area on the inside.
