I can offer a few time milestones. It's been a while since I've sat down to run this game, but I actually just started up another to see if I can get that sub 4:50 100%.
Sector 3 first visit ~1:15
Ridley ~2:30
Metroid Queen ~3:30
Sector 1 clean-up ~4:20
I think it's safe to assume that if your going to make sub 4/sub 5 times, these times are a must to meet. When I get back into it, I'll be sure to make note of the milestones that I find significant.
Sector 3 first visit ~1:15
Ridley ~2:30
Metroid Queen ~3:30
Sector 1 clean-up ~4:20
I think it's safe to assume that if your going to make sub 4/sub 5 times, these times are a must to meet. When I get back into it, I'll be sure to make note of the milestones that I find significant.