Rape Is Just A Game...Right?

Last year, an international women's group managed to get the 2006 PC game, RapeLay, banned from sale in Japan. But now it appears to have gone viral and can be downloaded on-line easily!!
RapeLay is a Japanese video hentai (or erotic) game that allows players to attack and rape children and women at will.
Here's its premise:
"RapeLay is a role-playing game, which lets a player choose a method of assault on a teenage girl at a subway. Gamers can grope her and lift her skirt. Players molest the girl, and even assault and rape her sister and mother. The ultimate goal: to make the three women sex-slaves, so the player can rape them whenever he desires. When a girl gets pregnant, players have to force her to have an abortion."
The many blogs about RapeLay range from horrified condemnation to - amazingly - total support!
So do games like this keep the real predators off the streets, or just encourage prowlers to try rape for real? What is the mind-set of the game's designers? Should RapeLay be included in a total ban on child pornography? Indeed, does this constitute porn at all...or is it, as some maintain, just - a - game?