Wrote a guide for this one at the end of the Archives event. Seems to be the hardest one to get (was for me at least), so since Uprising is in the arcade today, I thought I’d post my guide here:
as a google doc:
https://docs.google.com/document/d/1zvyyp3-11YlxyZLcJrsPquaXBrQ4rlfK5gwao4eKrYs/edit?usp=sharing
as a markdown file:
https://gist.github.com/mecha-lynx/764605620f279a12c39d8f97b32302a6
(It won’t let me post links directly so you’ll have to copy-paste them)
They’re the same, but some people may prefer one over the other. You’ll probably need friends to do it, though I’m sure others will be trying Legendary today to get the achievement.
Good luck!