Saiyuki: Many years ago, humans and demons lived in harmony. But that unity ended when demons started attacking humans and plotted a mission to unleash Gyumao - an evil demon imprisoned for thousands of years. Now, Genjo Sanzo, a rogue priest, must team up with three demons - Sha Gojyo, Son Goku, and Cho Hakkai - and embark on a perilous journey to the west to stop these demons from resurrecting Gyumao and restore the balance between humans and demons on Earth.

Saiyuki Reload: Priest Genjo Sanzo and companions Cho Hakkai, Sha Gojyo, and Son Goku maintain their westward journey to stop the resurrection of the demon Gyoumao. As the reputation of the Sanzo Ikkou precedes them, they continue to fight demon assassins at every turn, but they must also deal with increasing tensions within their group in order to defeat a powerful enemy. 

Saiyuki Gunlock: The Sanzo Ikkou continues its westward journey, on a mission to prevent a demonic resurrection. As Genjo Sanzo, Cho Hakkai, Sha Gojyo, and Son Goku fight their way to their goal, their path is fraught with internal strife. When they encounter a formidable pair of adversaries from the west, the cohesion of the group -- and the fate of the mission -- may be at stake. 

Saiyuki Reload Blast: It's been two years since the holy monk Sanzo and his followers Goku, Gojyo, and Hakkai were presumed dead, but not only are they very much alive but also continuing their journey to the west.

Saiyuki Reload -ZEROIN-: When the monstrous Gyumaoh was defeated by the war god Nataku Taishi and imprisoned in Houtou Castle, an era of peace began in the land of Togenkyo. Now, hundreds of years later, those seeking to resurrect Gyumaoh have unleashed a plague upon the world. The wave of negative power generated by his attempted resurrection has driven youkai to the brink of insanity. To save humanity from violent slaughter, Kanzeon Bosatsu sends Son Goku, Genjo Sanzo, Sha Gojyo, and Cho Hakkai to the west in order to prevent Gyumaoh from rising once again.