The game "Imagination is the Only Escape" recently sparked controversy, becasue a holocaust survivor condemned the game. Jack Kagan says that he is mad at the concept of the game.
The game is about a boy in east France after the Germans invaded France, and the only way to escape the horror is through fantasy.
"The Holocaust is serious for all humanity and I don't think anyone should make this kind of game. I'm very upset by it," Mr Kagan said.
The game is being developed by 21-year-old Briton Luc Bernard, whose mother is Jewish. It is being produced by Alten8, a private company licensed to develop games for Nintendo UK.
Mr Bernard, who now lives in France, told the JC that the game was intended to educate people about the Holocaust.
"This is to educate children. I don't find war to be a game and this will not contain any violence. Lots of other war games just have a lot of shooting and don't really show what war is, but that's not what I'm doing," he said."
But Mr Kagan said: "This is not educational. Holocaust education should not be done through games of this nature. People can read and watch things about the Holocaust, they do not need these kinds of games."