No Return: Drop sources, locations, and probabilities

Tips

There are many ways to get No Return in Warframe, but my recommendation for optimal efficiency would be to try one of these missions (in this order):

• Lua/Pavlov : It's a Spy mission (level 25-30). The item is dropped on rotation B (7.49%).
• Earth/Coba : It's a Defense mission (level 6-16). The item is dropped on rotation B (8.43%).
• Venus/Romula : It's a Defense mission (level 8-18). The item is dropped on rotation B (8.43%).
• Mars/Kadesh : It's a Defense mission (level 10-20). The item is dropped on rotation B (8.43%).
• Ceres/Seimeni : It's a Defense mission (level 15-25). The item is dropped on rotation B (8.43%).

These recommendations are based on the usual missions lengths, and the probability of getting the resource dropped.

Missions with a Chance to Get No Return as a Reward

Warframe Rotations Explained

• Defense: One reward every 3 waves, following this pattern: AABC.
  So, rotation A reward at 3 and 6 waves, B after 9 waves and C for 12 waves.
  Then it starts all over again.
• Interception: One reward each time 100% control is reached, following this pattern: AABC.
  Rotation A for the first two times, rotation B for the third and rotation C after four.
  Then it restarts from the beginning (5th round is rotation A).
• Rush: Number of transports destroyed:
   - Rotation A: one.
   - Rotation B: two.
   - Rotation C: all three.
  
• Spy: One rotation level gained per vault unlocked.
  First vault is rotation A, two vaults is rotation B, all three vaults unlocked is rotation C.

Mobs Dropping No Return

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