Metroid DNA refers to the DNA strand of Metroids in the advanced stages of their life cycle and an item in Metroid: Samus Returns. The areas on SR388 are blocked off by a toxic purple liquid, and to decrease the levels of the liquid so that Samus can safely access the next area, she must collect DNA from Metroids she kills and channel it into a Chozo Seal near the liquid. After killing each Metroid, Samus absorbs the DNA into her Power Suit, and then uploads it into the Seal using her Arm Cannon.
In Metroid II: Return of Samus, the next area was blocked off by the liquid until all Metroids in the current area were killed, which would instead initiate an earthquake, and thus Metroid DNA was never collected.
- Current amount of Metroid DNA
- "Metroid DNA ([symbol of Metroid DNA]) can be obtained by defeating Metroids."
On-screen message when trying to deposit Metroid DNA without having anyEdit
"Metroid DNA data is required to unlock this seal. No Metroid DNA is detected."
- Samus Aran eventually has her genetic makeup altered with the injection of Metroid DNA into her body near the start of Metroid Fusion's events. It is unknown if these are the same "type" of DNA.