SAS：绝响诡计 | Case 0 风暴蝴蝶

SAS：绝响诡计 | Case 0 风暴蝴蝶 released on December 12, 2025 as the prologue chapter ("序章") of the broader SAS：绝响诡计 series. The store description explicitly positions this as a self-contained prologue entry, describing it as containing one complete murder case, two bad endings, six character side stories, 81 CG images, and approximately 200,000 characters of story text — all created by a single developer. The description frames this release as a complete, standalone prologue installment rather than a game with planned post-launch updates or DLC. There are no unreleased DLC listings, no announced future content, no roadmap, and no developer communications indicating further updates to this specific title. While the phrasing "series prologue" implies future entries in the broader SAS series may follow, that refers to separate future games — not additional content for this release. This game launched as a finished, free-to-play product and has shown no post-launch update activity.