Phantom of Inferno (known in Japan as Phantom -PHANTOM OF INFERNO-) is an adult visual novel game created by Nitroplus, directed and written by Gen Urobuchi, distributed in North America by Hirameki International (a subsidiary of the Japanese visual novel publisher Hirameki).

Along the way, Zwei meets a girl by the name of Cal Devens and, though he tries to protect her, she too is drawn into Inferno to become the assassin, Drei (German for 'three').

In 2010, Nitroplus announced the game will be remade for the Xbox 360 featuring the same scenario but based on the designs created for the anime series from Bee Train.

Character designs from artists Minkao Shiba, Yoko Kikuchi, Tomoaki Kado, Yoshimitsu Yamashita, and Yoshiaki Tsubata were introduced into the 360 version.

The OVA series follows Zwei as he makes a trip to America, only to witness an assassination that leads to his memory loss and indoctrination into Inferno.

While a different path is taken, deceit and betrayal rip apart Inferno and place Ein and Zwei on opposite sides, which eventually leads to a climactic battle between them at the end of the anime.

Staff members include writer Yosuke Kuroda, who co-wrote and supervised the scripts from the staff writers Gen Urobuchi, Hideki Shirane, Noboru Kimura, Tatsuya Takahashi, and Yukihito Nonaka and designed by Bee Train artists Yoshimitsu Yamashita, Mutsumi Sasaki, Minako Shiba, Yoshiaki Tsubata, Tomoaki Kado, and Yoko Kikuchi.

At the final confrontation at the compound, Reiji will attempt to shoot Scythe, but Ein jumps into the way, taking the bullet for him.

During the final confrontation at the compound, Reiji will be shot at by an unknown sniper and both will play a game of cat and mouse to try and discover each other's position.

According to the official PS2 game guidebook, the endings are as follows: The Endless Nightmare: Reiji successfully escapes back to Japan and resumes his normal, everyday life with his family.

Reiji then goes to the warehouse in the desert and waits for Ein to find and kill him, which she does, lamenting his death and the scar in her heart.

This can be considered Ein's happy ending, and is more or less the same as the path to chapter 3, but since Reiji has no complete relationship with Cal, the two of them simply head south to start a new life together.

Reiji remembers that he vowed to survive at all costs, and shoots Claudia at the hangar, bringing her body and the disk back to Inferno.

Then all the kingpins are shot by Scythe's elite team, the Zahlen Schwestern, as part of Reiji's plan to take over Inferno and manipulate the criminal underground for himself.

Reiji finally visits Claudia's grave at a small cemetery on top of a lonely hill, looking down at the city below.

The ending password unlocks several extras such as the various production trailers, TV commercials, nearly all of the FMV sequences, and the sound track.

The Woman in the High Castle: Unlike "From Atop the Hill", this ending has only one version regardless of whether the player met Cal or not.

Reiji ends up dying in Claudia's arms, telling her that she needs to live and get back all the things stolen from her, and to take revenge on Inferno.

However, she still keeps the .38 special cartridge from the bullet that she shot Reiji with, and can't seem to get rid of it or forget what she did that morning in the Hangar.

To obtain this ending, do not fully complete Mio's path in chapter 3, and at the final choice, choose to go after Elen.

Cal arrives at the appointed time, and takes out the pocket watch that Reiji bought for her 2 years ago from a street vendor while the two of them were preparing for the counter snipe operation.

Scythe arrives after the sun has set with the Zahlen Schwestern and manages to get Shiga to back off and let him handle the situation.

When the semester starts, Mio, who was rescued from the ruins by Shiga (who of course insisted it was a kidnapping motivated by money), can't help but feel it was a dream.

They eventually trace her back to a Hong Kong brothel that handled young girls, and then to Ulan Bator, Mongolia, where the trail runs cold.

Shiga and his men follow them, but meet Scythe Master and the Zahlen Schwestern who also want to enter the school and kill Reiji.

The final scene shows cherry blossom petals fall all around Mio as she declares to look towards the future with optimism.

The two girls then have a duel which Elen is about to win, but Reiji jumps in front of Cal, blocking the knife with his back and fainting.

Godoh's men attack the church, and Elen convinces Cal to take Reiji and escape from the back while she holds them off.

She demands that Reiji have sex with her, but just as they are about to start, three members of the Zahlen Schwestern launch a surprise attack and are taken out by Cal almost instantly.

Cal blows up the last two Zahlen Schwestern using the chemistry lab, but is forced to drop her guns as Scythe uses Reiji as a hostage.