Blackout
The Blackout Tactical Alert was a series of missions given by Darvo from Friday, 10 April 2015, to the following Wednesday.
Ogma Elite
The Ogma Elite Tactical Alert was an Archwing mission available from 04 March 2015 to 09 March.
Phoenix Intercept
The Phoenix Intercept Tactical Alert was a series of missions that was available from 25 February 2015 to 03 March.
Overtake
The Overtake Tactical Alert appeared on Thursday, 22 January 2015, and lasted until the following Monday, on Sorath, Europa.
Fight or Flight
Fight or Flight was one of the Tactical Alerts running during December 2014, involving Corpus Rangers seeking to repair the damage to their ships.
Fleet Footed
Fleet Footed was one of the Tactical Alerts running during December 2014, involving Mobile Defence missions to intercept enemy broadcasts.
Toxic Terrors
Toxic Terrors was the fifth Tactical Alert, running in December of 2014, involving the elimination of Toxin-armed Scorpions.
Pack Mentality
Pack Mentality was the fourth Tactical Alert, running in December of 2014, involving the efforts of the Grineer to breed stronger war beasts.
Cold Revenge
14 November 2014 – 17 November 2014 Cold Revenge was the third Tactical Alert, running in November of 2014, involving the capture of Corpus war criminals. Mission On Friday (14 November), the alert became available and was present for the weekend. The Tenno received an inbox message from the Lotus. Inbox message:Tactical Alert: Cold Revenge...
Shifting Sands
10 October 2014 – 14 October 2014 The second Tactical Alert appeared in Update 14.10.2 as Shifting Sands. This was a new mission node on Phobos (presumably retconned to Mars as of Spectres of the Rail) that appeared on Friday (10 October 2014) and lasted until that Tuesday. Mission On Friday (10 October 2014), the...