Timelock Studio
Timelock Studio is a Russian video-game developer formed by members of the Serious Sam modding community.
Last updated August 31, 2026
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Overview
Timelock Studio is a Russian video-game development studio established in 2021 by long-time members of the Serious Sam modding community. The group became known for Serious Sam: Siberian Mayhem, a first-person shooter developed with Croteam and published by Devolver Digital. The project originated with community members who had worked as testers on Serious Sam 4 and believed that the game’s Russian settings offered room for a larger and more focused experience. Led by an initiative from a team member identified in development coverage as Evgeny, the group prepared an approximately 80-page design document and submitted it to Croteam in September 2020, shortly before Serious Sam 4 was released. Croteam initially approved the concept as a smaller three-level downloadable-content project for Serious Sam 4. As the scope expanded beyond a typical add-on, the project became a standalone expansion titled Serious Sam: Siberian Mayhem. The development process also transformed the informal modding collaboration into a formal studio. Team members brought complementary skills in level design, programming, art, testing, and other areas, allowing the group to operate as a compact development team despite having previously worked independently. Croteam provided creative and technical oversight, including advice on optimisation, while Devolver Digital handled publishing. Siberian Mayhem extends the Serious Sam formula with five levels set across an alternate-timeline version of Siberia. It combines the series’ large-scale combat, weapon-driven first-person action, secrets, and humorous tone with new environments, characters, weapons, and story material. The game follows Sam “Serious” Stone as he travels through Siberian settlements and military sites while pursuing General Brand and attempting to stop an invasion associated with Mental’s forces. The developers sought to retain classic Serious Sam characteristics while addressing aspects of Serious Sam 4 that they felt could be improved, and they incorporated secrets and Easter eggs during development. The game was teased through a short video in December 2021, formally announced on 10 January 2022, and released for Windows on 25 January 2022 through Steam and GOG.com. PlayStation 5 and Xbox Series X/S versions followed on 6 October 2022. Owners of Serious Sam 4 received a 25 percent discount at launch. Reviews were mixed to average overall; Metacritic reported a weighted score of 70 out of 100 based on 25 critic reviews. Publicly documented information about Timelock Studio’s broader product portfolio, corporate ownership, finances, leadership structure, and current operating status remains limited.
History
Timelock Studio emerged from the Serious Sam modding community rather than from an established commercial game publisher or a previously documented large development company. Several of its eventual members had known the Serious Sam series for years and had participated in community work around it. They also coincidentally worked as testers for Serious Sam 4, which gave them familiarity with the series’ tools, design language, and technical requirements. The concept that became Serious Sam: Siberian Mayhem began when the group saw additional potential in the Russian environments featured in Serious Sam 4. A team initiative, attributed in development coverage to Evgeny, led to the preparation of an approximately 80-page design document. The proposal was submitted to Croteam in September 2020, shortly before the release of Serious Sam 4. Croteam accepted the idea as a possible three-level downloadable-content project. Development grew beyond the boundaries of a conventional DLC package. The team expanded the setting, gameplay, and narrative until the project became a standalone expansion. The developers selected the title Serious Sam: Siberian Mayhem and established Timelock Studio in 2021. The transition from modding and testing to commercial game production introduced new responsibilities, including formal deadlines, marketing coordination, retail release planning, and localisation. Igor Grinkevich, identified as the project’s director, described the team’s complementary specialities as an important factor in making the collaboration work. Croteam remained involved as the creators and overseers of the Serious Sam series. It consulted Timelock Studio on creative and technical issues, including optimisation, while Devolver Digital served as publisher. The developers aimed to combine the series’ classic fast-paced combat and large enemy encounters with more modern design choices. They also sought to respond to shortcomings they perceived in Serious Sam 4. Secrets and Easter eggs were added throughout production, reflecting the project’s roots in fan and modding culture. Siberian Mayhem was first teased with a 34-second video released on YouTube in December 2021. Devolver Digital subsequently indicated that a new Serious Sam title would be announced in early January. The formal announcement arrived on 10 January 2022, followed by the Windows launch on 25 January through Steam and GOG.com. The title was presented as a standalone expansion to Serious Sam 4, although it remained closely connected to that game’s technology, universe, and narrative. Serious Sam 4 owners received a 25 percent launch discount. The game contains five levels and follows Sam Stone through an alternate-timeline Siberia as he attempts to stop General Brand, recover control of a supernatural artifact, and disrupt the forces of Mental. Its campaign introduced Siberian landscapes, new characters, weapons, and story events while retaining the series’ arcade-like first-person shooter structure. Console editions for PlayStation 5 and Xbox Series X/S were released on 6 October 2022. Critical reception was mixed or average, with Metacritic reporting a score of 70 out of 100 from 25 critic reviews. No reliable public material supplied here establishes a larger catalogue, subsequent releases, ownership changes, financial performance, or the studio’s present corporate status.
- 2022
Windows release of Serious Sam: Siberian Mayhem
[1]The standalone expansion launched for Windows on 25 January through Steam and GOG.com.
- 2022
Console release
[1]PlayStation 5 and Xbox Series X/S editions were released on 6 October.
- 2021
Timelock Studio established
[1]The Serious Sam community developers formalized their collaboration as Timelock Studio as the project expanded toward a commercial standalone release.
- 2021
First teaser released
[1]A short video showing Sam Stone in a frozen landscape teased the new project in December.
- 2020
Design proposal submitted to Croteam
[1]The prospective development team submitted an extensive design document for a Siberian Serious Sam project to Croteam in September 2020.
Products and positioning
A community-originated game developer focused on high-intensity first-person action and expansion of established Serious Sam gameplay.
First-person shooter video game · 2022
Serious Sam: Siberian Mayhem
A standalone expansion to Serious Sam 4 developed by Timelock Studio with oversight from Croteam and published by Devolver Digital. The game presents five campaign levels across an alternate version of Siberia, adding new weapons, environments, characters, secrets, and story content. Players control Sam Stone as he fights Mental’s forces and pursues the traitorous General Brand. The Windows edition launched in January 2022, followed by PlayStation 5 and Xbox Series X/S versions in October of the same year.
Brand decisions
2021
Transition from community project to formal studio productionStrategyBackground
The developers moved from informal modding and testing work toward production of a commercial retail game.
Action taken
They founded Timelock Studio and adopted a production workflow involving deadlines, marketing, localisation, and coordination with Croteam and Devolver Digital.
Aftermath
The team delivered a standalone Serious Sam expansion rather than the smaller downloadable-content project originally proposed.
2020
Proposal to expand Serious Sam 4’s Siberian settingProduct launchBackground
Members of the Serious Sam modding and testing community believed that the Russian environments in Serious Sam 4 offered enough unused potential for a more substantial project.
Action taken
They prepared and submitted an approximately 80-page design document to Croteam in September 2020. Croteam initially approved a three-level DLC concept.
Aftermath
The concept expanded beyond normal DLC scope and became the standalone game Serious Sam: Siberian Mayhem.
Sources2 sources
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