Blacktail (stylized in caps as BLACKTAIL) is a first person action-adventure game by a Polish studio, The Parasight (also stylized in caps). The game is based on Slavic folklore, namely that of Baba Yaga. The character's depiction in tales apparently is not coherent and leaves plenty of room for interpretation. In this game, you play as 16-year-old Yaga, still forging the legend, although Baba exists, too, as an antagonist. I'm not sure where the game's title comes from -- maybe the cat?