Superb game, but for a modern CAVE clone the highest difficulty is far too easy, around the average CAVE 1-ALL.
Post-CAVE games should rather push both easy & hard modes further from the middle than the reference.
If a Ultra mode or such is added this would sit comfortably alongside Crimzon Clover, etc. The system and stages are excellent, difficulty tweaking just feels a bit off.

Barely played this by the end of the year though..

Bitterblack Isle is too good.

Excellent story. But by the end the gameplay made me feel nothing and I just wanted it to end quickly.
Nothing about the RPG system was interesting apart from well made animations & character designs on it's surface.
That business management sim was kinda fun though..

Hardly finished though..

Only played before big 1.1 update