Corruption is the 35th season update to STO video game: Star Trek Online, to be released for PC on 17 February 2026. Corruption continues the storyline begun in Incursion and carried on in Both Worlds, Unparalleled, Unveiled and Unleashed about multiversal conflict between the Khitomer Alliance, Aetherian Concordium and various Borg nations.

This season sheds light on the Chimerans, a faction of corrupted organisms with Borg-like aspects and features the return of Nicole de Boer as multiple versions of Captain Ezri Dax.

Missions

• "Kings & Queens" story arc
  • "Curse of Phrygia": Old allies reunite, as Captain Ezri Dax urgently summons you to the MIDAS Array. Join her in quelling a Chimeran incursion that threatens both the integrity of the corrupted comms array, and the stability of the galaxy. Battle through waves of psionic beacons that call on enemy reinforcements in space, and push through a dangerously infested environment. Peril lurks in every dimly lit corner of the array -- so watch your step, and don't look back. The fate of the Multiversal War depends on your courage.
• Task Force Operations:
  • "Belly of the Beast": The MIDAS Array is under siege! Chimerans have compromised several decks of the communications array, threatening to overtake the entire structure. Starfleet Captain Ezri Dax is calling on a task force capable of tackling this relentless onslaught, and surviving until further back-up can arrive. Do you have what it takes to secure the decks, hold the line, and prevent the MIDAS Array from falling to the Chimerans?
• Events:
  • Corruption: Chimerans are spreading across the galaxy, corrupting all that stands in their way. As major fleets fall to ongoing sabotage and key Alliance structures are infested beyond repair, every victory now feels infinitesimal in the face of total annihilation. Confronting the Chimerans is no longer a choice, but the only viable path forward. Summon every ounce of your strength and join the fight, before it's too late.

Featured playable ships

all tier 6-rated

• Anniversary XVI Event:
  • Khitomer Alliance (Dominion Vanguard Fleet/Klingon Defense Force hybrid) Empersa-class miracle worker Alliance juggernaut
• Aetherian lockbox:
  • Aetherian Harmony-class dreadnought carrier
• 16th Anniversary Enterprise Starship Bundle:
  • Xindi-Primate Ateleth-class dreadnought cruiser (account unlock)
  • Kumari-class pilot light battlecruiser (new)
  • NP class miracle worker light escort (new)
  • NV class multi-mission temporal cruiser (new)
  • NX class escort refit and tier 1 NX light escort (account unlock)
  • Suurok-class intel science destroyer (new)
• First Contact Day event:
  • Noble-class intel battlecruiser (Sovereign-class variant)
• Summer Event (Lohlunat festival, Risa):
  • Gomtuu-class miracle worker science vessel
• Infinity Lock Box:
  • 23rd century Gral-class command scout
  • 23rd century Damocles-class miracle worker heavy frigate
  • TNG-era Klingon starship
• R&D Promo Box:
  • 23rd century Orion Orchid-class intel warship
• Mudd's Market:
  • Mudd's Masters of Picard Engineering Bundle:
    • Excelsior II-class intel heavy cruiser
    • Inquiry-class battlecruiser
    • Sagan-class command cruiser
  • Typhoon-class temporal battlecruiser
• other releases:
  • Yeager-class

Season 35 dev blogs

• Star Trek Online dev blogs are posted to the STO website.
• "Corruption - Coming February 17", announces the season, including the missions, return of Nicole de Boer as Ezri Dax and Thomas Marrone's promotion to STO's executive producer.
• "Anniversary XVI Event", announces the 16th anniversary event ship, the T6 Empersa miracle worker Alliance juggernaut. Its universal console is the ionized antiproton field projector, its juggernaut array the Empersa array antiproton overcharge lance. The ship's starship trait is the hyper-generative repair matrix. When the Empersa fires its special weapons, the ship suffers damage from its own antiproton fire.
• "The Aetherian Lockbox", published on 16 February 2026, announces the Aetherian lockbox and its contents: Aetherian Harmony-class playable starship; protonic crush proton weapon mechanic; you are dismissed universal console; Aetherian Concordium kit modules gleaming the cube, empowered blast, reverse gravity; personal ground trait at arm's length; space traits Aetherian beam enhancements, all aspects accounted for; Aetherian Concordium weapon pack space weapons: Aetherian Concordium proton cannon, Aetherian Concordium proton dual heavy cannons, Aetherian Concordium proton dual beam bank, Aetherian Concordium proton turret, Aetherian Concordium proton beam array, omni-directional Aetherian Concordium proton beam array, Aetherian Concordium wide arc dual heavy proton cannons; ground weapons: Aetherian Concordium proton sniper rifle, Aetherian Concordium proton high-density beam rifle, Aetherian Concordium proton compression bolt pistol, Aetherian Concordium proton split beam rifle; Aetherian vanity shield.
• "Command the Aetherian Harmony", published the same day, provides the stats and tooltips for the Aetherian Harmony temporal intel dreadnought carrier and its equipment, including its special weapon reconstruction portal console, Aetherian unification beam proton weapon and harmonic distribution starship trait.
• "Star Trek Online: Corruption is now live!", published on 17 February, highlights the new playable content of Corruption and Aetherian-themed items from the Lobi crystal store.
• "16th Anniversary Enterprise Starship Bundle", published by Fero on 25 March 2026, provides an overview to the components of the game's 16th anniversary bundle, which is inspired by Star Trek: Enterprise. It includes new starships, which receive their own sub-pages, and existing starships that become account unlocked: the Xindi-Primate Ateleth-class dreadnought cruiser, NX class escort refit and the tier 1 NX class light escort from the game's Lobi Store. Other items include MACO phase pistol (c. 2154), Andorian plasma split beam rifle and Enterprise EV suit
  • "The 16th Anniversary Enterprise Bundle" video on the STO YouTube.com website, presented as an in-universe documentary of the 22nd century starship classes.
  • "NP Miracle Worker Light Escort", covers the NP class miracle worker light escort and 24th century Ortiz-class.
  • "Andorian Kumari Pilot Light Battlecruiser, covers the Andorian Kumari-class pilot light battlecruiser and Human-Andorian Makras-class, as well as the Talas-class and Talas-class (Andorian) variants.
  • "NV Multi-Mission Temporal Cruiser", covers the NV class multi-mission temporal cruiser and the The Lost Era-inspired Interceptor-class.
  • "Suurok Intel Science Destroyer", covers the Suurok-class intel science destroyer and its modern counterparts, the Sonak-class and Sonak-class (Vulcan) variants.
• "Empersa Lance Updates", written by Systems Designer Mayo Uribe and published by Mike Fatum on 3 April 2026, details the functions of the lance weapon aboard the Empersa-class, the Empersa array overcharged antiproton lance.
• "Celebrate First Contact Day!", published 4 April 2026, details annual First Contact Day event.
• "Command the Noble Class Battlecruiser!", published 4 April 20026, provides the stats of the Noble-class intel battlecruiser, a tier 6 Sovereign-class variant and visual remaster of the tier 5 Noble-class assault cruiser.
• "Command the Gral Class Command Scout!", published on 7 April 2026, introduces the Gral-class command scout to the Infinity Lock Box, based on the USS Archer (NCC-627) from Star Trek: Strange New Worlds.
• "Mudd's Masters of Picard Engineering Bundle!", published by "Ambassador Kael", announces the addition of three hitherto lock box-exclusive Starfleet ships from Star Trek: Picard to the Mudd's Store: Excelsior II-class intel heavy cruiser, Inquiry-class battlecruiser and Sagan-class command cruiser. Harcourt Fenton Mudd also references Carl Sagan and his 20th century TV program Cosmos.
• "New Items in Mudd's Market", published by Fero on 17 April, announces the addition of hitherto-time-limited rewards as account wide unlocked: Starfleet Typhoon-class temporal battlecruiser, Beowulf blade and Khitomer Defender space set.
• "Return to Duty Starter Pack!", published on 21 April, announces the Return to Duty Starter Pack and lists its contents.
• "Quick Start: Return to Duty in Star Trek Online!", published on the same day, announces a Jem'Hadar Vanguard promotion plus recruitment event, and provides a roadmap for seasons 35-37, spanning from April to September 2026.
• "Command the Orion Orchid Intel Warship!", originally called "Orion Orchid Intel Warship [T6]", published on 27 April 2026 and republished with the new title on 28 April, provides the stats for the previously announced (see other releases) 23rd century Orion Orchid-class intel warship. Its universal console is bait and switch and starship trait "leaking radiation signature".
• "Command the Damocles Class!", published on 20 May, provides the stats of the 23rd century Federation Damocles-class miracle worker heavy frigate from Star Trek: Strange New Worlds.

Appendices

Connections

Season 35 images

Corruption.

Ezri Dax.

Aetherian lockbox.

Credence-class miracle worker dreadnought cruiser.

USS Credence (NCC-2604).

Credence class variants.

NV-class multi-mission temporal cruiser.

Miracle worker light escort classes.

NP-class miracle worker light escort.

Ganges NP-01.

Ganges in drydock in 2125.

Mekong NP-02.

Mekong with NP registry number prefix.

Antietam NV-06.

Ortiz-class miracle worker light escort.

USS Ortiz (NCC-80303).

Pilot light battlecruisers.

Chennault AT-01.

Project Makra assignment patch.

Stalking Makras-class pilot light battlecruiser.

USS Essex (NCC-173) assignment patch.

Noble-class intel battlecruiser.

USS Noble (NCC-81001).

Destruct Sequence Alpha-One.

USS Archer (NCC-627).

Roadmap for April-September 2026.

Orion Orchid-class intel warship.

OSS Orchid.

Damocles-class configuration variants.

Xindi-Primate Ateleth-class dreadnought cruiser.

USS Damocles (NCC-1279).

Other releases

• STO streams on the @StarTrekOnlineGame profile on YouTube.com
  • "Corruption Launch Trailer" promotional video released on 17 February 2026.
  • "The 16th Anniversary Bundle!" livestream from 17 March 2026, presented by Mikey Fatum (he/him), Keene/Pundus, Jamie/Scorp (they/them), Thomas Marrone (he/him) and Ramon Matas (he/him). It presents the visuals of the ships from the upcoming 16th anniversary bundle, including the last designs by former staff member Hector Ortiz. The ships were based on Star Trek: Enterprise and celebrate the series' 25th and the franchises 60th anniversaries. Each ship type is represented by two designs, one 22nd century and one 24th or 25th century counterpart. These include:
    • Andorian Kumari-class pilot battlecruiser with 2410s-era (STO era) Talas-class and Talas-class (Andorian) variants, represented by the IGS Kumari.
    • United Earth NP class miracle worker light escort with 2370s-era (TNG movie era inspired) Ortiz-class variant, represented by Mekong NP-02.
    • United Earth Starfleet NV class temporal multi-mission cruiser with 2340s-era (TLE inspired) Interceptor-class variant, compatible with Okinawa-class variants, represented by Antietam NV-06. Includes OTV type K42 shuttlepod hangar pets.
    • Earth NX class light escort account-wide unlock of the 2400s-era (PIC inspired) Drexler-class and Drexler Beta variants, represented by USS Excalibur NX-03.
    • Vulcan Suurok-class intel science destroyer with 2410s-era Sonak-class and Sonak-class (Vulcan) variants, represented by VSS Suurok (VS-01).
• "The 16th Anniversary Enterprise Bundle", published on 24 March 2026, presents an in-universe documentary about the legacy of four 22nd century starship classes, presented by Doctor Gabriela Marrero (professor, Early Federation Studies, Lake Armstrong University) and Proctor Sakonna (fellow, Vulcan Academy for Culture and Record).
  • "Fireside Chat with Thomas and Jeremy!", streamed on 21 April, is a discussion between Mike Fatum, Thomas Marrone and Jeremy Randal. This stream featured the first preview of the Orion Orchid-class starship and the Damocles-class variants. Marrone announced the Yeager-class for October or later in 2026. Bortus announced a unique bridge for Gomtuu. Marrone added the ships from the Kelvin timeline bundle will include contemporary STO-era (2410s) variants.
• A roadmap was released with content creators on 21 April 2026 and announces events and starship releases from April to September, stretching into Season 36. Announced ships include: Noble-class battlecruiser (First Contact Day event), Glal-class (from SNW, Infinity Lock Box) and Orion Orchid-class (from TAS and LD), R&D Promo Box) in April; Damocles-class (based on USS Damocles (NCC-1279) from SNW, Infinity Lock Box) in May; Gomtuu-class (from TNG, Risa Summer Event) in June, a Klingon starship (TNG, Infinity Lock Box) in July; followed by the Season 36 release with a Kelvin timeline starship bundle; a Kelvin timeline Romulan ship in August; an alien starship (TNG, Infinity Lock Box) in September; followed by a Federation starship (Infinity Lock Box) in Season 37.

External link

• Season Thirty-five: Corruption page at the Star Trek Online Wiki.