For this achievement, you must simply enter and exit each of the 7 Ridden Hives:
- 300 Below
- Blood Stream
- Brood Lair
- Caustic Cesspool
- Sunken Passages
- The Cut
- The Nursery (Inner Lair)
NOTE: You do not have to bother with the Skull Totems as they are only for earning the special Skull Totem currency. You may enter and immediately exit through the first "extraction point". It may be worth your time however, to look around for the hidden Golden Skulls; there is an achievement tied to each of the 7 Hives for finding this.
I found that farming for this was very quick by running (Act I - The Devil's Return) 1-1 Resurgence, from the campaign, on repeat. There are 3 possible spawns and the level is pretty short. All 3 are in the final area with all the tractor trailers. The Hives are random, so you just have to keep running them to eventually get all 7.
- Immediately to your left after exiting the construction zone; hop over the trailer and find it on the ground.
- In the back left corner (below and left of the Saferoom)
- Just below and right of the Saferoom
NOTE: One of your crew should run the Tool Kit, and use it on the bridge, to avoid a Swarm as you enter the construction zone. Of course, avoid the Birds in this area to prevent Swarms.