Unfortunately this is only one playable game about futa, so they have no rivalry. I dont know why people dont make games about futa, they are enchanted woman who can do many diferent actions, like fuck weak enemys and get fucked by strong, maybe bekause stupid stereotips like "cock = gay".
As an admin over at Futanari Palace, I can answer this question as to why there aren't more games; There
are more games, but are badly publicized or never make it out of the conceptual phase due to numerous technical issues. Also, there were plenty of games about 10 years ago. Everything from little RPGs to
good visual novels. Then everything dried up. It just stopped. Artists still kept cranking out pictures and writers kept writing despite never really having an appreciable audience because no one wants to waste time on comprehending words, but the games stopped. What did trickle out was a slew of hastily assembled RenPy shovelware (IMNSHO) using the same tired Blender models in the same hackneyed scenarios. There were RPG Maker games as well, but the greater community has a massive prejudice for RPG Maker anything.
Another problem is there are few
dedicated futa games. Sure there are games out there with futanari content, but it is usually an afterthought at best and token at worst. Games that have futanari in them as a side item can easily either excise the writing indicating futanari and/or replace the futa artwork with a regular female and be straight up vanilla porn. The futanari aspect is a decoration; the character doesn't do anything with the cock she has. In my view, why bother. It violates the Chekov's Gun rule in literature. In the same vein, the futanari fetish is almost always subliminated by one or both of the following fetishes; furry and hyper. If you look in the furry or hyper communities, you will find all sorts of futanari stuff. However, if you do not care about furry or hyper (I certainly do not) then you are simply shit out of luck.
One final thing about the Majalis Duo is that they have the combination of skills to make a good game happen; a writer, coder and talented artist. You would be surprised how genuinely difficult it is to get that combination together. It is a pain I am acutely familiar with in my own endeavors. With Maj writing and coding and Alis cranking out art, as long as they both maintain quality control and herd enough cats in the community to keep the popularity ball rolling, they cannot fail. You are right that they have no real competition. FortunateVirgo's
Hardcoded is an excellent game and well done, but that developer simply releases builds too few and far between to keep up with Majalis. Beyond that, there really is not much else out there. Sure other would-be developers are working on their own projects, but they all have developmental issues, usually an absence of required talent. Either a developer can code and draw, but can't write for shit. On the flip side, a developer can code and write, but cannot draw worth a damn. The Community wants the full package and dismisses, sometimes unfairly, projects that do not meet the expected criteria. Those developers become disheartened and quit, leaving a void. The
worst thing any creator can receive from the community is indifference.
I hope that answers your question as to why there aren't more futanari games out there. Long story short, The Majalis pair has the right talent to pull a project off. Other developers have problems with getting the talent together. Dedicated futanari games are rare for this reason and the fetish is usually lorded over by the furries and the hyper fetishists.
