Descent I, Level 10, insane difficulty, no hits from enemies, cold start, full rescue, 114HP at exit
Difficulty rating (survival): 2
Difficulty rating (over 100): 10 (very extremely hard)
12.
Only 12 shields can be recharged in this level, there are no more shield spheres. Maybe those advanced lifters drop one once in a blue moon.
So you need to be very careful if you want to have more shields at the end than you had when you started the level. Try not to fight with spiders in small spaces because baby spiders may get stuck there, and surprise you.
There are two very risky areas in this level: the room behind the blue door to get the yellow key, and beyond the red door, the sources of the problem are those little annoying drillers...