Harusame (はるさめ) is the developer and publisher named on Steam for DmonMaster. On note and Zenn, as tokoharusame, they describe themselves as an individual developer making games in Unity entirely through AI without writing code; both profiles link the X account Xyepia. Location is not stated.
A grind-free 3v3 auto-battle hack-and-slash about collecting 100 Dmon; the solo developer says AI has written all of the code since January 2026, on top of a core written by hand in 2025.