Captured (2023-05-01) - Changed "non-Borg" to use the affiliation icon instead, as Decipher seemingly intended. (The original wording also applied to ex-Borg like the Followers of the One.)
Classic Communicator (2020-07-06) - Nerf. Can no longer be immediately used when downloaded into an active mission attempt. Made unique for clean rules.
Classic Medical Tricorder (2020-07-06) - Nerf. Can no longer be immediately used when downloaded into an active mission attempt. Made unique for clean rules.
Classic Tricorder (2020-07-06) - Nerf. Can no longer be immediately used when downloaded into an active mission attempt. Made unique for clean rules.
Containment Field (2022-08-01) - May not leave play. No longer a hidden agenda. No longer has Going To The Top restriction. Cannot be used anymore to one-sidedly tax opponent's downloads by discarding with Q the Referee and retrieving with Tribunal of Q.
Defend Homeworld (2022-08-01) - Nerf. Removed [Referee] icon. Added "voluntarily" to prevent combo with Chula: The Way Home & The Issue Is Patriotism.
Dr. McCoy (2020-06-01) - Dr. McCoy's ability to repeatedly nullify MEDICAL dilemmas was overwhelming to several dilemma strategies and overly powerful. His errata limits this ability to once per game.
Halkan Council (2016-12-24) - General cleanup and adjustment to prevent Lt. Sisko and other DS9-era Original Series cards from reporting here with Crossover: An Invitation.
Operate Wormhole Relays (2016-12-24) - Changes in the game had made this card effectively so useless it might as well have been blank, so it was totally rewritten and re-released.