...so I thought I got lucky with "Asylum on Earth" doff mission since all 3 traits were there, and it looked like blue or purple was guaranteed with over 40% on both, and failure was 0%...

BUT IT FAILED? How? Why? Was it a bug?

Rounding display error would be my guess. I've noticed a couple times where my total percentages would add up to 99% or 101%. So either you ran into a bug or got amazingly unlucky.

There are some missions where the orange "failure" means you get an uncommon reward, Green "success" means you get a rare reward, and blue "critical" means you get a very rare reward.


It can be confusing.

Orange (failure) was 0% that is why I am confused why it failed

Rounding error is in fact the culprit. It's on Falling Sky's list of things to look at when he has time.

First time I had doff refugee all 3 traits green and amazing percentage on blue and purple.. and i get rounding error... lucky me!

The rounding error is in the display, not the actual percentages.

The datatype on the percentages is probably a long int or equivalent, which means it can store quite a few digits. So the actual percentage might be 0.04522389214% fail. There's no way its going to display that in the UI. So it rounds to the nearest (0%). But its still a 0.04522...% fail chance, so every so often it will fail.