The Riftbreaker

Bioanomalies are the big glowing structures you can find on any map. You can drill them with and they will summon an alien attack on your position and when you’re finished drilling will drop loot. Note they drop better loot if you have equipment like Energy Sensors and Gathering Tools equipped.

In the Crystal Caves biome special bioanomalies can appear as well, they are purple and red (red are the strongest by far) and cast a very big glow. They have a very recognizable center that beats like a heart. These drop very, very amazing loot but also summon some of the most insane sized attacks on your position. Mines and turrets will not be enough. If you have red quality guns with mods you can stop drilling and engage in a hectic and fun fight. If you don’t you can either build base defenses and walls there or retreat to an existing base. This swarms will always follow you across the map even after a respawn.

If you’re playing campaign there are several levels where you don’t really build an outpost and you can skip most of the map. You cannot return to these locations, however with a good radar you can locate a lot of these bioanomalies, and I’d recommend taking the time to do so as while they slowly respawn on existing maps but not at a great rate.

The main campaign map should have around 10 by itself but if you’re looking around you should have this almost done before even reaching your main base map (or be very close).

Note: this achievement popped for me after a restart.