Half-Life: Blue Shift/A Leap of Faith

Follow Dr. Rosenburg to the teleporter room. Listen to him and he will advise you to climb up to the "Control Room". Once there he'll advise you to pull the "Main Power" lever. Before the system overloads run back upto the main gangway to turn the "System Pressure" valve, head back to the control room. Once the light strip on the wall next to the teleporter has lit to the top, he'll advise you to active the "Displacement Field Dampening Locks" to create the portal. You'll have to keep pressing the dampening locks for Walter, Simmons, Dr. Rosenburg and then finally yourself. This leads into the final cutscene and the end of Half-Life: Blue Shift