Variable Removal

Variable Removal is a Railroad radiant quest in Fallout 4. It requires the Sole Survivor to go to a random location and eliminate a Courser. If left unchecked, a Courser could cause a lot of damage to the Railroad's infrastructure.

Detailed walkthrough
1. Eliminate the Courser

Your Pip-Boy will have been updated with the location of the courser (they are different random locations). Travel to that location and eliminate the courser however you see fit. The only kill required to complete the quest is the courser's but you can kill all the synths at this location without turning the entire Institute hostile.

2. Report back to Predictive Analytic Machine

Return to P.A.M. at the Railroad HQ. She will congratulate you on a job well done and give you bottlecaps and sometimes a weapon.

Possible locations

 * ArcJet Systems
 * Boston mayoral shelter
 * General Atomics factory
 * Mahkra Fishpacking
 * Nuka-Galaxy
 * Poseidon Energy
 * Reeb Marina
 * Sandy Coves Convalescent Home
 * University Point
 * Wattz Consumer Electronics
 * RobCo Battlezone
 * Vault-Tec: Among the Stars
 * Starlight Interstellar Theater

Bugs

 * If P.A.M. is reprogrammed and brought back to the Prydwen after the completion of Tactical Thinking, the quest will still be given as if you are still a member of the Railroad.
 * The radiant target may sometimes fail to change and can become locked into one location, i.e. only ever having the courser appear at University Point and not at any other location.

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