一開始，阿羅由的村民會派遣一些人朝著13號避難所的方向四處偵察，幫助那些與自己有同樣想法的人。但是隨著時間推移，這樣的活動愈來愈少，並最終停止了。放逐者教導他們生火、種植等他們需要的生存技巧。Engineering and science to build their homes. Fighting to protect what was theirs.
The Vault Dweller and Pat led the village and the tribe. The tribe grew, and grew strong with their help. In 2188, their daughter, who later became the Elder, was born. Eventually, she and their other children became the leaders of the community.
On January 16 2208, several years after Pat's death, the Vault Dweller wrote his memoirs. 之後，他從阿羅由消失，並被人們認為已經去世。放逐者原來的避難所服裝摺疊著放在床邊。有人說放逐者被某種不可思議的力量帶走了，也有人說放逐者是又開始旅途，留下長老們來引導阿羅由。經過一個月悼念放逐者周期結束，阿羅由的生活又回復原來的樣子。
放逐者女兒作為長老的最後特訓開始。她忍受了一系列體力訓練和其它各種輔助特訓——科學、數學以及各種武器的使用。兩年後放逐者的女兒接受了她的精神測試——她服用了一種由哈庫寧的花園裡種出來的致幻植物製成的葯，之後走進試煉神殿，在手槍壞掉後用她的魔力通過大部分測試。她還給測試做了許多修正，resulting in many revisions. 兩天後，她成為部落長老。接下來的數十年中，阿羅由長老悉心打理着這個小小的部落，而她的努力也受到了部落成員們認可和尊敬。
While the Chosen One was on his quest, on July 20, 2242, Arroyo was attacked by Enclave soldiers in vertibirds, wearing Power Armor, armed with energy weapons, and the villagers were captured and brought to the oil rig. Some of them tried to resist the attackers and were killed, and Hakunin was seriously wounded. When the Chosen One returned to the village, he found it almost completely destroyed and found a dying Hakunin among the dead bodies. Now, the Chosen One had a new quest - to save his people from the hands of the Enclave.
The Enclave needed the tribals for their FEV experiments. They needed two test groups: one of clean, pure humans and another composed of the "mutants" that lived all over the mainland, suffering radiation and FEV exposure for decades that, to the Enclave, made them unclean. The unclean sample was easily obtained by kidnapping the entire population of Arroyo. The clean group were the dwellers of Vault 13, who were reunited with their long lost Arroyo brethren in Enclave prison cells.
In Fall 2242, the Chosen One managed to enter the Enclave using a damaged tanker and destroyed the Poseidon Oil platform, killing the President of the United States and severely setting back the Enclave's plans for world domination. The surviving people of Arroyo and Vault 13 were free.
After the Enclave's destruction, the refugees of Arroyo and Vault 13 resettled, building a new community with the aid of the Garden of Eden Creation Kit. Finding themselves hundreds of miles from their Vault, the members of Vault 13 chose to join the villagers in establishing a new community, and their technical expertise, combined with the villagers survival skills, allowed the new settlement to grow and prosper. Two generations of the same bloodline were reunited, and their savior, the Chosen One, became Elder, presiding over the village of New Arroyo in the years to come. Certain that the safety of the new village had been secured and the new community was flourishing, his mother, the old Elder, passed away a few months later in her sleep.
It is very likely that the city eventually joined the NCR.
Arroyo appears only in Fallout 2.