I need this too is it easy??
I did it with my son, took 15 minutes on casual. We died a few times, casual seems more like normal, but you could probably solo it. If not, i can help.
2 other comments
I will no doubt get there mate but my profile has been corrupted again and I can’t play!!
I think I’ve figured out why but as of yet I haven’t fixed it like last time.... gonna grab my physical copy out of the loft and try tomorrow on my 360
Use hunting rifles to destroy 20 machines. - Generation Zero
Use assault rifles to destroy 80 machines. - Generation Zero
Destroy 80 Runners. - Generation Zero