Several wasteland legends persist that Festus is a centuries old guardian of the Sunset Sarsaparilla treasure. The legends are technically correct, 事實上費斯圖斯是羅伯科为夕阳沙士公司做的机器人，用于把旧型号替换掉。他被用于和游客或来访者进行交互。
废土上的其他机器人都或多或少有一些AI，但費斯圖斯只是一个简单的机器，通过特定语音指令来控制播放预先存好的录音。其他的費斯圖斯都被夕陽沙士买下了and shipped to the company's regional offices located around the United States. 但由于2077年的大战，没能投入使用。
Festus is barely operational with centuries of wear and tear. The wooden cabinet holding the robot is falling apart, having been shot several times and water damaged, and the animated rancher himself has also been shot, breaking the front glass window and taking his right arm and right eye. His speaker is also damaged, constantly shifting in quality and volume as the prerecorded lines are played.
如果在對話中選我感到幸運，信使可以和他玩名為Lucky Horseshoes的21點。Festus can be asked for instructions on which buttons perform which action.
Number cards count as face value.
There are no face cards (Jacks, Queens, Kings, and Jokers).
The goal of the game is to get closer to 21 than Festus in order to win the hand.
Unlike blackjack, going over 21 is not an instant loss.
Players may draw or hold, however once they hold they are done drawing for that hand.
If the players are equally close to 21 (for example 17 - 25), the player who got there first has the advantage.
If a player draws and their new total equals the other player's total, the other player's total is increased (bumped up) by one. This is known as lucky horseshoes, and ensures that ties are not possible.
The story Festus tells about the origins of Sunset Sarsaparilla conflicts with the information he gives: He mentions that before Sunset Sarsaparilla was invented, the main choices people had for drinking was water or Nuka-Cola. The Nuka-Cola Corporation was founded in the year 2044, but according to the logo of the Sunset Sarsaparilla headquarters, Sunset Sarsaparilla was founded in 1918, over 125 years before Nuka-Cola was invented.
After completing Legend of the Star, Festus will begin to tell a completely different version of the star cap origin tale. In this story all major events are mostly the same as the first time, but some happen in a different order (for example, the bar owner receives the recipe before he hears news of the stranger's death).
"Howdy partner, welcome to the headquarters of the Sunset Sasparilla company. Wrangle up a stool and listen to ol' Festus jaw awhile."
"Excessive ingestion of Sarsaparilla can lead to deleterious effects including, but not limited to: kidney damage, nausea, digital numbness, anxiety, loss of visual acuity, dizziness, occasional nosebleeds, joint inflammation, tooth decay, sore throat, bronchitis, organ rupture and halitosis."
Festus is a reference to the character Festus of the 1952 radio and 1955 television Western drama series Gunsmoke.
Sometimes when entering the Sunset Sarsaparilla headquarters a loud metal crashing noise can be heard (like when a robot crashes to the floor), due to Festus having turned 180 or 45 degrees to face the wall. Interaction is still possible even though the player character will only be able to see the back panel. He may eventually turn back if you re-enter. [已核实]
It is possible to knock him unconscious with the Golden Gloves or boxing tape. If done so you cannot speak to him and he will not regain consciousness. If you do kill him you can walk through him. [已核实]
Sometimes, when entering dialogue, the words may skip to the next line. The next lines will also skip until you are ready to talk. [已核实]