There are 10 different types of Anomaly Class ranging from Class 1 (easiest) to Class 10 (hardest).
• Class 1 = (Faction) Hideaway or Drone Cluster (easiest)
• Class 2 = (Faction) Burrow or Drone Collection
• Class 3 = (Faction) Refuge or Drone Assembly
• Class 4 = (Faction) Den or Drone Gathering
• Class 5 = (Faction) Yard or Drone Surveillance
• Class 6 = (Faction) Rally Point or Drone Menagerie
• Class 7 = (Faction) Port or Drone Herd
• Class 8 = (Faction) Hub or Drone Squad
• Class 9 = (Faction) Haven or Drone Patrol
• Class 10 = (Faction) Sanctum or Drone Horde (hardest)

Each Anomaly Class has 4 different level's ranging from Level 1 (easiest) to Level 4 (hardest).
• Level 1 = (Faction name) + Anomaly Class (easiest)
• Level 2 = (Faction name) Hidden + Anomaly Class
• Level 3 = (Faction name) Forsaken + Anomaly Class
• Level 4 = (Faction name) Forlorn + Anomaly Clas

Faction
Angel Cartel - Domination
Blood Raiders - Dark
Guristas - Dread
Serpentis - Shadow
Sansha - True
Rogue Drones - Sentient