Terminus 4

Terminus 4 is part of the Carter Science Center. It is located in a highly secure underground facility that requires both a Level-2 passcard and a Top Secret password to gain access. Terminus 4 is headed by Dr. Glen Ogawa who is the Chief of both α-Project and β-Project.

α-Project and β-Project are conducted at Terminus 4, though the exact timing is unknown. β-Project test subjects are seen in Terminus 4 shortly after Derrick awakens from his coma. There are also separate wings in the facility for each project. This seems to indicate that they began simultaneously.

The observation area includes ten beds located in a centralized room. This room is adjacent to both an interrogation room and a medical bay. The med-bay has several pieces of diagnostic equipment, a hospital bed, and an operating table. The α-Project wing is inaccessible to the player. The β-Project wing reveals that β-Project subjects have access to a play area which may also be observed.

After entering a coma, Derrick was moved from Terminus 4 to the main facility of the Carter Science Center. Terminus 4's password does not change in the fifteen years during the T'lan invasion. This allows Alex to enter Terminus 4, though additional security measures deem Alex to be an intruder because she is not identified as Terminus 4 personnel.

Terminus 4 draws inspiration from Black Mesa's Lambda Complex, an advanced research compound in the Half-Life Series.