If you're talking about the characters in this game, the specific term is shemale (it's not a slur people, put the pitchforks away), especially since I don't know/remember if they're trans women, women who magically or scientifically gained a penis, or some other explanation. However, if you don't want screamed at by people with nothing better to do, you can call them dickgirls, which I believe covers both shemales and futanari.