I know to a map you need to finish it with at least half full HP bar but what is the exact condition Sometimes i can play 80~90% of a map and still fail pls someone explain to me : (

Yes you need to finish with at least half full HP to a map but some maps have stricter HP drain (1 being least strict and 10 being the strictest) than others making them harder to get a on. Is it due to that?