Finding:

1. close

   Doctor Rosenberg

   Before Harold dies, Barney Calhoun discovers him, and he instructs Calhoun to find Dr. Rosenberg to help him with his plan.
2. close

   Barney Calhoun

   Whilst fighting his way through the facility, he stumbles across Dr. Rosenberg, a high-ranking researcher working on teleport technology. ... | Barney Calhoun |
3. close

   Black Mesa Research Facility

   Security officer Barney Calhoun escaped relatively early on, along with Dr. Rosenberg, a high-ranking scientist related to the original teleportation project, and two other scientists (Walter Bennett and Simmons) in a Black Mesa SUV. ... This facility can also be accessed in the Opposing Force expansion pack by activating the alt-fire on the Displacer in the map the weapon is found in.
4. close

   Half-Life: Blue Shift

   Alyx Vance · Doctor Arne Magnusson · Dog · Doctor Eli Vance · Father Grigori · G-Man · Doctor Isaac Kleiner · Doctor Judith Mossman · Colonel Odessa Cubbage · The Resistance · Doctor Richard Keller · Doctor Rosenberg · Doctor Wallace Breen ... | The box art for Blue Shift, depicting protagonist Barney Calhoun |
5. close

   Gordon Freeman

   He soon meets up with Barney Calhoun and Alyx Vance, and joins the resistance against the Combine. ... Alyx Vance · Doctor Arne Magnusson · Dog · Doctor Eli Vance · Father Grigori · G-Man · Doctor Isaac Kleiner · Doctor Judith Mossman · Colonel Odessa Cubbage · The Resistance · Doctor Richard Keller · Doctor Rosenberg · Doctor Wallace Breen
6. close

   City 17

   Thanks to the efforts of Gordon and Barney Calhoun, the last of the city's citizens were evacuated via train. ... Father Grigori · Odessa Cubbage · The Resistance · Doctor Richard Keller · Doctor Rosenberg
7. close

   List of Combine non-combat technology in Half-Life 2

   The command panels found in City 17 are generally used to open and close gates and for communication, the latter of which is seen when Barney Calhoun communicated with Doctor Isaac Kleiner in the opening levels in the game. ... Father Grigori · Odessa Cubbage · The Resistance · Doctor Richard Keller · Doctor Rosenberg
8. close

   Alyx Vance

   Barney Calhoun additionally mentions that Freeman is a "lucky dog" to travel alongside Alyx. ... Alyx Vance · Doctor Arne Magnusson · Dog · Doctor Eli Vance · Father Grigori · G-Man · Doctor Isaac Kleiner · Doctor Judith Mossman · Colonel Odessa Cubbage · The Resistance · Doctor Richard Keller · Doctor Rosenberg · Doctor Wallace Breen
9. close

   Headcrab

   Headcrabs are also referred to as head-humpers by Barney Calhoun and parasitics by the Combine Overwatch. ... Alyx Vance · Doctor Arne Magnusson · Dog · Doctor Eli Vance · Father Grigori · G-Man · Doctor Isaac Kleiner · Doctor Judith Mossman · Colonel Odessa Cubbage · The Resistance · Doctor Richard Keller · Doctor Rosenberg · Doctor Wallace Breen
10. close

    List of Half-Life universe characters

    Barney Calhoun ... Father Grigori · Odessa Cubbage · The Resistance · Doctor Richard Keller · Doctor Rosenberg

Explore the following pages on Powerset:

• Doctor Rosenberg,
• Barney Calhoun,
• Black Mesa Research Facility,
• Half-Life: Blue Shift,
• Gordon Freeman,
• City 17,
• List of Combine non-combat technology in Half-Life 2,
• Alyx Vance,
• Headcrab,
• List of Half-Life universe characters