Sundered

I would say this is the hardest of all the achievements, simply because of how annoying gathering every perk is.

Thankfully, you don't need them all to be rank 3 or 4.

Play the game as normal, and get to the end of every "Endless Hordes" room. Each of those has a special set perk (full list here: https://sundered.fandom.com/wiki/Perks)

Break open all the Corrupted Treasures you can find to get more, and do as many of the purple-covered ones as you can.

I'm not sure if semi-secret Eradicator perk is required, but if so here's how to get it (spoilers, obviously):

Overall, this achievement is more about patience than it is skill.