ZeniMax Online Studios
| Company type | Subsidiary |
|---|---|
| Industry | Video games |
| Founded | August 1, 2007 |
| Founder | Matt Firor |
| Headquarters | Hunt Valley , United States |
Area served | Worldwide |
Key people | Joseph Burba (studio director), Matt Firor (former studio director) |
| Products | The Elder Scrolls Online, Doom (support), Fallout 76 (support) |
Number of employees | 300 (2025) |
| Parent | ZeniMax Media (subsidiary of Microsoft Gaming) |
ZeniMax Online Studios LLC is a United States-based video game developer operating as a subsidiary of ZeniMax Media, with a focus on massively multiplayer online games. The studio is known for creating The Elder Scrolls Online along with its expansion packs. Around 2012, the workforce numbered approximately 250 employees. The main office is located in Hunt Valley, Maryland, complemented by additional branches in Budapest, Austin, San Diego, Seattle, and Wisconsin.
2007–2018: Establishment and The Elder Scrolls Online
Founded on August 1, 2007, by ZeniMax Media under the leadership of Matt Firor, an experienced MMO designer formerly of Mythic Entertainment, ZeniMax Online Studios was created to develop a flagship MMO project. Early on, the studio partnered with Simutronics to license the HeroEngine. By mid-2008, it had relocated to its Hunt Valley headquarters.
In 2010, the studio incorporated the Fork Particle SDK into its MMO development toolkit. A year later, ZeniMax Online launched a customer support center in Galway, Ireland, intended to back upcoming MMOs and generate extensive employment opportunities; however, this facility ceased operations by 2015. That same year, the company integrated Splunk for business intelligence and network oversight and entered into a licensing agreement with Elastic Path Software to enhance digital commerce capabilities.
In May 2012, ZeniMax Online confirmed that its forthcoming MMO would take place within The Elder Scrolls universe, set approximately one thousand years prior to The Elder Scrolls V: Skyrim. This game, The Elder Scrolls Online, was released in 2014. Beyond this principal MMO title, the studio also supported other Bethesda releases such as Doom and Fallout 76.
2018–2024: New IP development, Microsoft acquisition, and growth
Starting in 2018, ZeniMax began crafting a new Triple-A online looter-shooter called Blackbird, featuring a third-person perspective and a sci-fi noir style; this marked the launch of an original intellectual property and franchise. By December 2020, the company established a satellite office in San Diego dedicated to this new IP. In 2022, Creative Director Ben Jones disclosed that development had been underway for over four years with roughly 200 team members involved.
In March 2021, Microsoft completed its $7.5 billion acquisition of ZeniMax Media, incorporating the studio into Microsoft Gaming and significantly broadening its global reach and product offerings.
The following year saw ZeniMax expand internationally by acquiring Hungary-based Nemesys Games and rebranding it as ZeniMax Online Studios Hungary.
Efforts toward labor organization surfaced when approximately 300 QA testers at ZeniMax Online Studios voted to unionize under "ZeniMax Workers United-CWA" in January 2023. By December 2024, a larger group of 461 designers, engineers, and developers formed "ZOS United-CWA". In response to these developments, Microsoft entered into a labor-neutrality agreement in 2024 committing not to obstruct unionization efforts across all ZeniMax subsidiaries.
These initiatives underscore ZeniMax's strategy centered on growth through new intellectual properties, acquisitions, and cultivating a stable workforce within Microsoft's corporate framework.
2025–present: Workforce reductions and organizational changes
In March 2025, Xbox leadership commended ZeniMax's MMO Project Blackbird, which had expanded to a team of 300 employees with a planned launch in 2028. Nevertheless, by July 2025, Microsoft implemented layoffs across the company that impacted ZeniMax, leading to the termination of Blackbird and the appointment of Joseph Burba as the new studio director, replacing Matt Firor. Earlier, in May 2025, amid the threat of a strike, Microsoft and ZeniMax Online Studios reached an agreement with the ZOS United-CWA union to increase minimum wages and introduce a revised credit system.
Games developed
| Year | Title | Platform(s) | Notes |
|---|---|---|---|
| 2014 | The Elder Scrolls Online | macOS, Microsoft Windows, PlayStation 4, Xbox One, PlayStation 5, Xbox Series X, Stadia | |
| 2016 | Doom | Microsoft Windows, PlayStation 4, Xbox One, Nintendo Switch, Google Stadia | Support role |
| 2018 | Fallout 76 | Microsoft Windows, PlayStation 4, Xbox One | Support role |
Cancelled games
| Title | Platform(s) | Notes |
|---|---|---|
| Commander Keen | Android, iOS | Mobile project discontinued |
| Project Blackbird[lower-alpha 1] | Unknown | Project terminated |
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