Mass Effect - At the top exit elevator and head left. Take ramp up. Cut scene will show Geth troop ship. Ashley/Kaidan will call saying the bomb is under attack. Shepard has a choice of rescuing Kaidan or Ashley. If you choose the one at the bomb, go back to elevator and use it. Exit elevator. Cross room. At big door mini radar gets jammed. Open the door. Several Geth are here, including a Juggernaut and a Prime. Kill them. After the fight Saren will start a conversation. After the chat Saren will attack. Shoot him and after so much damage he leaves. If you choose the one at the anti-aircraft cannon. Go to the north door. Follow path. Go to AA elevator. Open it. Use it. At top several Geth will be attacking. When Shepard kills them a conversation With Saren will start. After the conversation Saren will attack. Shoot him and after so much damage he leaves.