Quake 2

You play as a soldier whose surname is Bitterman, and he is one of the members of the "Lord" operation. The main goal of the operation is to close the portal through which stroggs send their troops to Earth. During the unsuccessful landing most of the soldiers were captured or killed. The landing capsule of the main character lost its course at the very beginning as it collided with another capsule - as a result he appeared aside the planned landing zone, at the small suburb of the stroggs base. The paratrooper remained alone and he got to the nearest connection point. From now your task is to close the stroggs portal on your own.