SiNiSistar 2 is a pixel-art action RPG about a demon-slaying nun that is absolutely not safe for work. This week, Steam put it on the homepage. The result was math: a 477% spike in concurrent players, peaking at 2,764.

That’s the Steam feature effect. Valve’s curation algorithm slotted an unapologetically adult game into the Featured Win chart alongside mainstream new releases, and thousands of players clicked through without a second thought.

The game launched May 15 from developer Uu and publisher Eroge Japan at $14.99, discounted 20% to $11.99. It currently sits at 90% positive across 20 reviews. And the reviews deserve their own hall of fame. One positive review, from a player with 9.6 hours logged, was automatically flagged by Steam for “potentially harmful content” and had its text hidden entirely. Another player with 3.4 hours constructed an elaborate ASCII art copypasta defending their right to play NSFW games on their main account — “so what?” A third offered a complete critical assessment: “Holy moly.”

The timing adds a wrinkle. In July 2025, Valve purged thousands of adult titles from Steam following pressure from payment processors including Visa, MasterCard, and PayPal, The Guardian reported. The crackdown came after a campaign by Australian organization Collective Shout targeting games depicting sexual violence. Valve never publicly clarified where the new content line falls.

SiNiSistar 2 appears to be on the right side of it — for now. Steam’s algorithm gave it front-page billing, the players showed up, and at least one of them had so much to say that Steam censored the review. You love to see it.

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