Futa Fighters (M.U.G.E.N)

From the letters page: An ongoing side-scroller from FrozenHaze, Futa Fighters (M.U.G.E.N) was built with Other. The story follows a female protagonist through futa/trans, futa/trans protagonist and monster girl. Available for Windows, about 988 MB.

From the box: “Join the arena with over 55 fighters and 16 different stages in the arena. Also every fighter is female (and futas). That's right not one single male in this game.”