Exclusive Mastery

Most Mastery-rewarding items or their blueprints can be directly farmed, bought or researched. The following items are the exceptions. They are equipment that had a limited distribution period or have been removed from circulation.

Founder Exclusive
Acquisition: Impossible.

These items were given to those who donated to the earliest stages of the game. As rewards for their help at that crucial time, these items can never after be obtained.

Market Retired
Acquisition: None currently, with exceptions.

These items were once for sale in the Market but have been removed. These items can be obtained through other means;
 * The Machete and Snipetron have appeared as special Alert or Tactical Alert rewards.

Event Reward
Acquisition: None currently.

These items were available as rewards from special Operations, or just from logging in during celebratory periods like anniversaries or development milestones. Some items were formerly in this category, but have since been obtainable through other means such through Sorties or Baro Ki'Teer.

In May 2013 the developers said that the Vandal Series are exclusive. At that time there were only the closed beta Braton Vandal and Lato Vandal, and unlike subsequent Vandal weapons these have never been re-released. In February of 2014, the developers stated there is always a chance every one-time-only item could return, but walked this back concerning the Founder items which remain emphatically exclusive.

Prime Vault
Acquisition: Blueprints and parts still obtainable by Vaulted Relics or tradeable from players.

These items were removed from the Void drop tables to make room for newer Prime items. For now, the blueprints and parts can only be obtained from other players who acquired them previously.

Since, the Relics containing said Primes are vaulted instead, which makes their parts still available, given one has the respective Vaulted Relics. Items in the Vault return periodically as part of the Vault Access program (see the Prime Vault page for details).

Void Trader
Acquisition: Directly tradeable from players if Unranked, with the exception of the Prisma Shade, and the Prisma Burst Laser. While Inaros also cannot be traded, the blueprint for his quest can be.

These are part of Baro Ki'Teer's merchandise. They will occasionally return to the Void Trader's stock on future visits.