Portal:Fallout: New Vegas
They are generally laid-back beasts with surprisingly docile dispositions. Wild bighorners growl and snort if someone gets too close, and only attack if the offender does not back away from them fast enough. Bighorners with young, however, become enraged if their young are approached, and fight to the death with very little provocation in order to protect their offspring.
The game takes place in 2281, four years after the events of Fallout 3, and thirty-nine years after Fallout 2. The Courier, the player's character, is meant to deliver a package from Primm to New Vegas. However, the Courier is intercepted by the Great Khans and Benny, who leave the Courier for dead in a shallow grave.