Talk:Neo M1/@comment-2600:8803:E400:507:CD0C:61:95CB:A0CE-20180716225006/@comment-173.67.24.18-20180718054956

Category is difficulty. Go to Interception or Survival and look at the missions, they have tiers of difficulty.

Rotation is akin to number of caches collected. Example of Defense, survive 3 rounds of 5 waves to get to the 3rd rotation drop.