Beast Rizer: Ryuji's Journey

Petropolis: Ryuji's Journey, known as Petropolis: Chapter Ryuji (ペトロポリス：章竜二) in Japan, is a spinoff hack-and-slash video game developed by Burst Arts Inc. and published by Namco Bandai. It focuses on Ryuji Takamoto searching for clues on his missing family, while also dealing with a Giant Island priestess from the Feudal Era. It was released exclusively on the PlayStation 3, released in 2009 internationally.

Synopsis
Taking place during the events of Petropolis A, Ryuji Takamoto was doing his usual training session until he found a letter in front of his door. Inside it is an enveloped saying "If you want to find out where your family is, meet me at Crane Summit." Feeling suspicious about the letter, Ryuji does what the sender told him to. But on the way, he finds the sky turning purple, and a plethora of demons emerge from a dark portal, followed by a mysterious priestess in Eastern-style clothing. After stopping some demons, Ryuji encounters the priestess, named Yuuki, and tells him about the letter. After hearing his situation, Yuuki decides to aid Ryuji as he searches for whoever wrote that letter saying that his family is still alive.

Characters
Ryuji Takamoto: Ryuji makes his playable comeback, retaining his moveset from Petropolis 7. Later in the game, he gains the ability to control and summon demons on his side.

Kana Hanasaki: A feline swordswoman who claims to remember Ryuji since childhood. It was revealed that she knew the fate of Ryuji's family and wrote him a letter about it. After their meeting in Crane Summit, Kana joins Ryuji and Yuuki in their fight against the demons. Besides the monster summoning, Kana plays like Ryuji, but is more nimble and easier to control.

Yuuki: A priestess from the Feudal Era who fell into the Eastern Islands alongside the demons, She was rescued by Ryuji, who was offered her aid in finding his family. However, she tricked him into fighting all the Four Sacred Monsters, which revealed her true colors. She also reveals that Ryuji's family was held hostage by her for a long time. Ryuji, however, was able to defeat her with ease, banishing her and the other demons into his sword, which he sealed later on. In the end, Ryuji and his family were safely reunited while Kana disappeared.