Kitrinos is one of the best bonuses offered: a complete game with no less than 6 completely original puzzles, and which highlight the background of the decor of the universe of the Black Cube series. The game engine offers a scrolling vision of the decor, like the adventure games of the 90s, and the old-fashioned side remains present throughout the work, oscillating between kitsch, old reporting and other effects giving a patina to the visual ensemble. The challenge may be short, it will easily take more than 4 hours to complete it if the player does not "cheat" and tries to find everything by himself. As in the other episodes of the Black Cubes, the author does not skimp on the quality of the visuals and cutscenes.