Use the following steps. Note: Do not become friends with Eve. Get both key cards and go through the lower levels (second elevator). After reaching the third floor of the lower levels, attach an Android Reconfiguration Device to an android. The android will open the systems door for you. You will now see a large garage door. Go through it to reach the back of the warehouse. Go outside of the facility and notice that Buck's car is gone. Go to the left, exit through the gate, and watch the ending.