Overseer Rank

Overseer rank was a leveling system It was exclusive to the game mode.

Discontinued
Nuclear Winter was discontinued on September 8, 2021. Players were reimbursed via perk coins relative to their overseer rank and overseer tickets, while many of the Nuclear Winter-exclusive rewards were implemented into Adventure mode in form of plans, which can be earned by completing events.

Characteristics
Instead of using the levels achieved in Adventure mode, Nuclear Winter used a separate but similar system, with each advancement being the next Overseer rank. XP were gained by competing in battle royale matches, and, as the player progressed, they were able to access more areas of Vault 51, revealing the Vault's story in the process. In addition, they also received various cosmetic rewards with each new overseer rank, including player icons and armor skins. XP and caps were also given to the player character in Adventure mode after the completion of a match.

Rewards
Note: Perk card packs were obtained at every rank.

Vault-Tec University
These rewards were available from September 10 to October 23, 2019. 3000 Overseer XP was required to claim every reward.

Halloween 2019


These rewards were available from October 29 to November 12, 2019, and December 11 to December 16. 14000 Overseer XP was required to claim every reward.

Note that only one reward could be obtained each day. After unlocking a reward, one had to wait until the day after before attempting to earn the next reward. Every reward was made available on November 3.

Christmas 2019


These rewards were available from December 17, 2019, to January 6, 2020. 27001 Overseer XP was required to claim every reward.

Note that only one reward could be obtained each day. After unlocking a reward, one had to wait until the day after before attempting to earn the next reward. Every reward was made available on December 22nd.

Also, progress for each individual reward could only be started if the previous reward had been acquired.

Survivors


These rewards were available from May 19 to June 11, 2020. 14650 Overseer XP was required to claim every reward.

Note that only one reward could be obtained each day. After unlocking a reward, one had to wait until the day after before attempting to earn the next reward. Every reward was made available on May 26.

Also, progress for each individual reward could only be started if the previous reward has been acquired.

Bugs
After patch 20, a bug occurred in Nuclear Winter wherein the Halloween, Christmas, and Survivors limited-time event rewards could be re-obtained. This bug was active until patch 21.