This is the KA-50 Campaign that comes with the game by default, that has fixes applied to make missions work as originally intended, russian users will have russian subtitles with Russian Voice Overs whilst english users will have English subtitles and English Voice Overs.
ALERT: Due to the poor performance of the AI Helicopters in DCS being what it is, I am unable to re-test the missions with the AI playing as me in DCS 2.5.x (They can't do simple CAS work, they can't see the targets, if by a miracle they do, they don't use their long range weapons (Vihirs) at stand off range but instead run in to very close range and get shot down, they also don't use rockets or the cannon at all, they do however run in and aim but never fire.
This is still work in progress (WIP) and maybe updated at a later date.