I don’t think Valve is wrong to have standards, and these particular standards make sense. My issue is with how they communicate with publishers. See JAST’s statement on Muramasa, for example: https://jastusa.com/page/the-state-of-muramasa

Our case is, unfortunately, not unique in the industry. An increasing number of visual novel games are getting unjustly banned from Steam, with no recourse. This creates an environment where publishers don’t release games like Muramasa because the risk is too high with Steam’s heavy-handed hold on the PC market, stifling the medium and forcing publishers to adopt self-censorship to survive.

It seems like JAST is not entirely sure why Valve is firm in barring Muramasa from their platform. I suppose they could be deliberately withholding that information, but it seems unlikely.

Muramasa is not set in high school and clearly isn’t indulging in or glorifying sex/violence/sexual violence, and it doesn’t seem like Valve has much of an issue with explicit sexual content given how easily I ran into games like Being a Dik without even searching for it, among hundreds of other 18+, sex-heavy games.

The experience is pretty awful for players. You get releases like Subarashiki Hibi, where 10% of the game is available on Steam, and you need to download the patch from the publisher’s website. At that point, why bother buying the game on Steam? Why not just buy it directly from the publisher?

It’s unfortunate. Valve could make it easy for publishers for being very specific about what content they do not want to see, and what would need to be stripped out, and whether off-site patches can be offered for the offending content. It seems like publishers are just guessing what might set off Valve’s alarms.