Viper V16 is an eroge

Eroge

An or Ero-ga is a Japanese video or computer game that features erotic content, usually in the form of anime-style artwork. Eroge originated from galge, but unlike galge, they feature erotic/pornographic content.-History:...

 released in 2002

2002 in video gaming

The year 2002 in video gaming saw the release of many games to sixth-generation video game consoles, predominately, the Nintendo GameCube, PlayStation 2, and Xbox.-Events:...

 for the PC

Personal computer game

A PC game, also known as a computer game, is a video game played on a personal computer, rather than on a video game console or arcade machine...

 by the now defunct Sogna

Sogna

Sogna is a now defunct eroge/bishōjo company from Japan. Originally created in the early 1990s, Sogna became well known for appealing, simple and well-animated eroges that have received a moderate cult following.Each game generally features young Japanese girls who, in one way or another, find...

. It consists of two separate titles: "Rise" and "Imagine".

Story

Three Anna Miller's

Anna Miller's

is a chain of restaurants in Hawaii and Japan. The first branch opened in 1973 in Hawaii; most of its expansion since has been in Japan. The chain is known for its breakfast selection and even more known for its desserts such as pies and cheesecakes....

 waitresses (Akira, Saki and Karin) are kidnapped and imprisoned by a mysterious race of subterranean men—and their leader, Seed—who seek to use the girls for reproduction

Sexual reproduction

Sexual reproduction is the creation of a new organism by combining the genetic material of two organisms. There are two main processes during sexual reproduction; they are: meiosis, involving the halving of the number of chromosomes; and fertilization, involving the fusion of two gametes and the...

. Akira reveals—much to her friends' chagrin—that she is a martial arts

Martial arts

Martial arts are extensive systems of codified practices and traditions of combat, practiced for a variety of reasons, including self-defense, competition, physical health and fitness, as well as mental and spiritual development....

 expert, but was at first too afraid to do anything. Using Akira's skills, the trio escapes and attempt to navigate an underground maze in order to reach the surface world. One wrong move though and the girls will face a lifetime of sexual exploitation.

Endings

There are eight possible endings to the game, depending on the player's actions as they control Akira and battle the subterranean creatures and, finally, Seed himself. The possible endings are listed below:

1. Akira is molested by a guard.
2. A blue guard rapes Akira.
3. A green guard rapes Akira.
4. Akira admits her inferior power and becomes Seed's sex slave.
5. Saki and Karin are captured and raped, while Akira fights Seed. If the player loses, ending #4 occurs. If the player wins, Akira is raped by a mind-controlled Saki and Karin, then by Seed.
6. The girls escape from their cell. Akira battles a guard, but Saki is captured by another guard. Akira defeats the guard and finds Seed, who is having intercourse
   Sexual intercourse
   Sexual intercourse, also known as copulation or coitus, commonly refers to the act in which a male's penis enters a female's vagina for the purposes of sexual pleasure or reproduction. The entities may be of opposite sexes, or they may be hermaphroditic, as is the case with snails...
   
    with Saki. A battle ensues. If the player wins, Saki decides to stay with Seed and the game ends with Saki having a cute baby and becoming queen
   Monarch
   A monarch is the person who heads a monarchy. This is a form of government in which a state or polity is ruled or controlled by an individual who typically inherits the throne by birth and occasionally rules for life or until abdication...
   
   of the subterranean race. This ending is the "true ending".
7. Akira fights Seed. He demands that she let him rape her; Karin volunteers, however, and the game ends with her getting raped.
8. This ending is almost the same as ending #6; however, if you win, Saki decides to join Seed. There aren't sex scenes in this ending.

Imagine

In Imagine, the main character is a student in a two-year vocational school. He goes to school and encounters three lovely girls, each in a different room. One girl yearns to become a voice actress, another is majoring in music, and the third is unsure of what future she seeks. Depending on the choices the player makes in this story, he can hook up with any or none (If the player attempts to hook up with all of them, they will resent him as a letch) of the three girls.