Season Twelve: Reckoning

 was released on January 26, 2017 on PC and April 18, 2017 on Console. First released in conjunction with the 7 Year Anniversary Event on PC, it continued the storyline begun in Agents of Yesterday: Artifacts with the episode, added the Tzenkethi Battlezone, expanded the Alpha Quadrant sector map, added a Research and Development school for crafting kits and modules, introduced the Lukari Restoration Initiative.

Systems
Ground balance changes
 * New Reputation System
 * Lukari Restoration Initiative with new rewards/currencies:
 * Lukari Marks
 * 9 new Reputation Traits, unlocked at Tier 1–5
 * Lukari Restoration Initiative Starship Technologies
 * Lukari Restoration Initiative Armaments
 * Lukari Restoration Initiative Operative
 * Lukari Restoration Initiative Reputation Store
 * Kit Modules:
 * Tactical Kit Module - Piezo-Electric Grenade
 * Science Kit Module - Piezo-Electric Lattice
 * Engineering Kit Module - Protomatter Generator Drone
 * New Research and Development school
 * Kits and Modules School
 * Kits and Modules School
 * 23 Feb, 2017 patch: Re-balancing of a great number of ground abilities and items.

Locations and missions

 * Feature Episodes, part of the New Frontiers episode arc
 * PvE Queue missions (Normal/Advanced/Elite)
 * Tzenkethi Space Battlezone
 * Expansion of the Alpha Quadrant sector map
 * Antos Sector, Arbazan Sector, Argus Sector, Balancar Sector, Berengarius Sector, Delta Sector‎, Draconis Sector, Eta Serpentis Sector, Ferasa Sector, Fesarius Sector, Gon'cra Sector, Izar Sector, Maxia Sector, Rotanev Sector, Sauria Sector
 * (Weekend event: 23 Feb - 27 Feb, 2017)
 * (First Contact Day week-long event)
 * Expansion of the Alpha Quadrant sector map
 * Antos Sector, Arbazan Sector, Argus Sector, Balancar Sector, Berengarius Sector, Delta Sector‎, Draconis Sector, Eta Serpentis Sector, Ferasa Sector, Fesarius Sector, Gon'cra Sector, Izar Sector, Maxia Sector, Rotanev Sector, Sauria Sector
 * (Weekend event: 23 Feb - 27 Feb, 2017)
 * (First Contact Day week-long event)

Accolades

 * Kill Accolades - Tzenkethi
 * Kill Accolade - Gravity Kills
 * Tzenkethi Battlezone Accolades
 * Kuumaarke's Log Exploration Accolades
 * Kits and Modules R&D - Technologist Accolades
 * Undiscovered Lock Box DOff Assignment General Accolades

Items

 * Undiscovered Lock Box
 * Lobi store
 * Type II Phaser Compression Pistol (c. 2285)
 * Starfleet Experimental Environmental Suit (c. 2293)
 * Klingon Experimental Environmental Suit (c. 2293)
 * Romulan Experimental Environmental Suit (c. 2293)
 * Cross-Faction Bundle - NX Escort Refit Equipment
 * Outfit Box
 * Zambean outfit
 * Ithenite outfit
 * Farpoint Cnidarian Pet (non-combat companion)

Ships

 * 7 Year Anniversary Event
 * Lukari Ho'kuun-class Science Vessel
 * Allied Escort Bundle
 * Caitian Shikaris-class Escort
 * Fleet Caitian Shikaris-class Escort
 * Ferasan Slithus-class Escort
 * Fleet Ferasan Slithus-class Escort
 * Hathos-class Warbird
 * Fleet Dhelan-class Warbird
 * Infinity Lock Box
 * Tal Shiar Khlinae-class Adapted Battlecruiser
 * Tal Shiar Mandukar-class Adapted Destroyer
 * Infinity Promotion! - Research & Development Pack
 * Universe-class Temporal Heavy Dreadnought Cruiser
 * Durgath-class Temporal Heavy Dreadnought Battlecruiser
 * Valkis-class Temporal Heavy Dreadnought Warbird
 * Lobi Crystal Consortium
 * NX-class Escort Refit
 * Multi-Mission Explorer Bundle
 * Brigid-class Multi-Mission Surveillance Explorer
 * Esquiline-class Multi-Mission Strategic Explorer
 * Palatine-class Multi-Mission Reconnaissance Explorer
 * Ahgamas-class Multi-Mission Surveillance Vessel
 * Khaimas-class Multi-Mission Reconnaissance Vessel
 * Ihgomas-class Multi-Mission Strategic Vessel
 * Galas-class Surveillance Explorer Warbird
 * Surhuelh-class Reconnaissance Explorer Warbird
 * Taenen-class Strategic Explorer Warbird
 * Undiscovered Lock Box
 * Atlas-class Prototype Dreadnought Cruiser
 * D9-class Dreadnought Battlecruiser
 * Thrai-class Dreadnought Warbird

Giveaways

 * The week of Season 12's launch, several Zen Store items were given away.