The Red Chess Queen is technically herself an unseen character in the American McGee's Alice series. However, much speculation and debate has framed around if she has made an appearance or not, as many times, the Queen of Hearts is often referred to as the Red Queen.
Through the Looking-GlassEdit
In Through the Looking-Glass, when Alice ventured in the Garden of Live Flowers, they commented they had seen another Little Girl but this one was "thornier" than Alice, and that she moved very fast. The Red Queen showed Alice that Looking Glass land is a land that strongly resembles a chess board, and if she can get to the other side, Alice could become a Queen. When Alice has indeed become a Queen, she and the White Queen asked Alice questions that defied logic and after a long time of this nonsensical debate, they both drifted asleep. Alice arrives at a dinner party in her honor, and when it becomes wild, Alice shakes the Red Queen "into a kitten" where it turns out the Queen had been Dinah's dark offspring, Kitty.
American McGee's AliceEdit
In American McGee's Alice, the Red Queen of chess herself made no specific appearance, but its been highly speculated that she and the Queen of Hearts have been merged into one entity. Besides the usual common misconception that they are the same character, and that the White King himself claims that the Red Chess pieces are under the Queen's command, despite the Red King is the one who has the White Queen beheaded and who Alice fights, this supports that she may in fact be part of the Queen of Hearts.