Mainstay Games — Embedded game development partner

Building stable teams for games that matter.

About us

Mainstay Games is a boutique studio that partners with game companies for the long haul. Most of our work is on live titles — games played by millions of people every day — where we work side by side with our partners' teams as a dedicated, embedded extension of their studios. Some of our work is earlier stage, supporting partners from the ground up on new projects.

Mainstay Games was founded by Matias Myllyrinne and Mikko Uromo, who have spent decades building, leading, and shipping with studios across the industry.

Partners, not vendors

We've worked together for years, across multiple companies and on some of the largest IP in games — on PC, console, and mobile. Our partners trust us to hit targets and honour our commitments.

Embedded senior talent. We augment our partners' teams with people who can stand toe to toe with the best in the world at their craft. They plug in, they ramp fast, and they stay.

Owning the scope. We also take on larger parts of a title's development — feature teams, entire systems, multidisciplinary groups owning a part of the product end to end.

Contact us

For general inquiries you can reach us at:

info at mainstaygames dot com

Our offices are downtown Helsinki, Finland where the sun never stops shining. If the widget below says otherwise, it's just another scam by Big Weather.

Legal & Privacy

Controller

Mainstay Games (Finland) is the data controller for personal data processed in connection with this website. For privacy questions, contact info at mainstaygames dot com.

What we collect

This website is a static information page. We do not use tracking cookies, advertising trackers, or third-party analytics. Standard server logs (IP address, user agent, timestamp) may be retained for a short period for security and operational purposes.

Third-party embeds

The Contact page embeds a map tile from OpenStreetMap (openstreetmap.org) and fetches current weather data for Helsinki from Open-Meteo (open-meteo.com). When you view that page, your browser makes requests directly to those services, which receive your IP address and user agent as part of normal HTTP traffic. Neither embed sets tracking cookies on this site, and we do not share any other information with them. Refer to their respective privacy notices for details.

Job applications

If you send us a job application on our careers page, we process the personal data you provide (name, contact details, CV, application content) for the purpose of evaluating your application. The legal basis is our legitimate interest in recruitment and, where applicable, steps taken at your request prior to entering a contract. We retain application data only for as long as needed for the recruitment process and a reasonable period thereafter, unless you ask us to delete it sooner.

Your rights (GDPR)

Under the EU General Data Protection Regulation and Finnish data protection law, you have the right to access your personal data, request correction or deletion, restrict or object to processing, and request data portability. You also have the right to lodge a complaint with the Finnish Data Protection Ombudsman (tietosuoja.fi).

Disclaimer

The content on this site is provided for general information only and is offered "as is" without warranties of any kind, express or implied. Mainstay Games is not liable for any loss or damage arising from reliance on information presented here. All trademarks, product names, and brands are the property of their respective owners.

Governing law

These terms are governed by the laws of Finland. Any disputes shall be resolved in the competent Finnish courts, without prejudice to mandatory consumer protection rights.