Half-Life 2 Episode Two-Our Mutual Fiend

Arriving at White Forest, Alyx and Gordon reunite with Isaac Kleiner, and Eli Vance. Alyx finally delivers the transmission packet acquired in Episode One to Eli and Dr. Kleiner. They also meet Arne Magnusson in person, another former Black Mesa scientist who is an egotistical, verbose, authoritarian, and who holds a grudge against Gordon.
Gordon and Alyx learn that the White Forest team is preparing a special rocket which they plan to use, in conjunction with the satellite array launched during the events of Half-Life and Alyx's data packet, to close the Combine superportal.