When the level starts, go all the way down the hallway to Bruce Banners left. You will find a large door. Go through that door and either sneak past or defeat the guards. There should be a door to the left of you. Go through that door. Once
through it, either defeat or sneak past the guards. Next, stand in the large circle with bars around it. Press Y at the screen inside of the circle with bars around it. This should take you to the fifth floor. Once there, you should see a large
computer down the stairs. Either defeat or sneak past those guards. Go to the right of that big computer. You should find a smaller gray computer. Go to it and press Y. A code terminal screen should appear. Enter the desired terminal code. Note: Per game, you can only open up the code terminal once. Use it wisely unless you want to repeat the entire process.