What Firefly Studios does

Firefly Studios is a London-based independent game developer founded in 1999 by Simon Bradbury and Eric Ouellette, specializing in the castle-simulation and real-time strategy genre. The studio's core output is the long-running Stronghold franchise (14+ titles since 2001), combining city-building economy systems with real-time siege combat across historical settings including medieval England, the Crusades, and East Asian warlord periods. Technology has historically relied on a proprietary isometric 2.5D engine refined over 25 years; the studio is transitioning to Unreal Engine for Stronghold 4, scheduled for 2026.

The company monetizes through three primary streams: (1) premium one-time-purchase Stronghold titles and remasters sold via Steam, GOG, and mobile app stores at $5.99–$49.99; (2) Stronghold Kingdoms, a free-to-play massively multiplayer online strategy game launched on Steam in 2012 with in-game virtual currencies, still generating engagement 15+ years post-launch; and (3) post-launch DLC and expansions. Distribution is anchored on Steam (Top Sellers status for recent Definitive Editions) and Devolver Digital, which acquired the studio in 2021 and serves as publisher. A new IP, Romans: Age of Caesar (co-op MMO), is in limited closed Alpha.

The studio operates with a lean team of roughly 40 full-time staff across programming, art, production, design, QA and marketing, with offices at Thomas House in London's Eccleston Square. Customer base is exclusively consumer/SMB — millions of individual strategy-game enthusiasts worldwide — and the company has no enterprise/government exposure. Notable commercial milestones include Stronghold: Definitive Edition selling 100,000+ units in 72 hours (Nov 2023), Stronghold Crusader: Definitive Edition selling 250,000 units in three weeks (Jul 2025), and Stronghold Kingdoms reaching one million players within two months of its Steam launch.

Name

Firefly Studios

Legal name

FireFly Studios Limited

Website

https://fireflyworlds.com

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

11–50 employees

Short description

Firefly Studios is a London-based independent game developer (founded 1999, ~40 staff) that builds and operates the Stronghold franchise of castle-simulation and real-time strategy games, monetizing via premium Steam/GOG sales, DLC, and the free-to-play MMO Stronghold Kingdoms for a global base of strategy-gaming consumers.

Ownership category

akta.pro rank

Product category

Strategy Video Games

SIC

Services-Miscellaneous Amusement & Recreation (7990)

akta.pro primary industry

Strategy/4X/Management Game Studios (MPAFAAAK)

akta.pro secondary industry

Live-Service & MMO Game Studios (MPAFAAAD)

Keywords

• Castle simulation games
• Real-time strategy games
• Medieval strategy games
• Video game development
• Multiplayer online games

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Software

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Premium Game Sales: Traditional one-time purchase model for mainline Stronghold titles and remasters, sold through Steam, GOG, and direct digital distribution. Prices range from $5.99 to $49.99 depending on title and edition.
2. Free-to-Play (Stronghold Kingdoms): Massively multiplayer free-to-play model with in-game purchases (Firefly Crowns, Florins, Gems, Trajans virtual currency). Reached 1 million players in 2 months on Steam launch. Supports entire company.
3. DLC and Expansions: Post-launch content including new campaigns, character packs, maps, and customization options for Definitive Edition titles. Examples include Swine's Bay DLC and Valley of the Wolf DLC for Stronghold: Definitive Edition.
4. Mobile Gaming: Cross-platform releases for iOS and Android, including Stronghold Kingdoms mobile with redesigned touch controls and cross-play with PC/Mac players

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels8 records

Core offering

Firefly Studios develops and publishes the Stronghold franchise of castle simulation and real-time strategy video games across PC and mobile, combining city-building, economic management, and medieval siege warfare. Its catalogue spans one-time premium titles, remastered Definitive Editions, DLC packs, and the free-to-play MMO Stronghold Kingdoms with in-game virtual currency purchases, distributed globally via Steam, GOG and the iOS and Android app stores.

Differentiator

Problem solved

Functional benefit

Products and services

• Stronghold Crusader: Definitive Edition Real-time strategy and castle simulation game shifting the setting to the Middle East and the Crusades, where players manage economies, build castles, command Crusader-era armies, and battle AI lords across skirmish and campaign modes, including new co-op and 8-player multiplayer for strategy game enthusiasts.
• Stronghold: Definitive Edition Remastered castle simulation and real-time strategy game set in medieval England, combining city-building, resource management, taxation, peasant welfare, and siege warfare for long-time Stronghold fans and new strategy players.
• Stronghold: Warlords Real-time strategy and castle simulation game set in East Asian warlord-era China, Japan and Mongol territories, introducing AI Warlord commanders who can be recruited, upgraded and commanded directly on the battlefield with unique perks and abilities, targeted at historical RTS fans.
• Stronghold 2: Steam Edition Remastered castle simulation and real-time strategy sequel set in medieval England with expanded unit rosters, deeper economic management and multiplayer siege combat, published on Steam with Workshop and achievement support for long-time Stronghold fans.
• Stronghold Legends: Steam Edition Fantasy-themed castle simulation and real-time strategy game featuring King Arthur, Vlad the Impaler and Siegfried factions with mythological units, aimed at players seeking a fantasy-styled Stronghold variant.
• Stronghold Crusader 2 Sequel to Stronghold Crusader built on a new 3D engine with physics-based siege combat, 8-player multiplayer and co-op skirmishes, providing deeper Crusades-era RTS gameplay for competitive and co-op strategy players.
• Stronghold 3 3D castle simulation and real-time strategy game with realistic physics, freeform castle construction, and night-time siege battles, marketed at players seeking a modernised Stronghold experience in medieval England.
• Stronghold Crusader HD High-definition remaster of the 2002 Stronghold Crusader RTS, with four historical campaigns and over 100 skirmish missions targeted at nostalgic players seeking a modernised Crusades-era strategy experience.
• Stronghold Kingdoms Free-to-play massively multiplayer online castle and grand strategy game in which thousands of players compete in persistent online worlds with faction alliances, cross-platform play, and in-game virtual currency purchases (Firefly Crowns, Florins, Gems, Trajans).
• Space Colony: Steam Edition Sci-fi base-building strategy game in which players construct and manage off-world colonies, expanded with Steam Workshop, achievements and trading cards for strategy fans seeking a non-medieval Firefly title.
• MetaMorph: Dungeon Creatures Dungeon crawler action-strategy hybrid developed by the Firefly Labs internal team, released via Steam Early Access as a prototyping vehicle for new IPs beyond the Stronghold series.

Quantifiable outcome

• Over 13 million lifetime sales across the Stronghold series
• +4 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration10 records

Feature3 records

Partnerships

Six partnerships are on record, tiered core and minor.

• Devolver DigitalcoreChannel Partner/ Reseller/ Distributor · 1 January 2021Devolver Digital acquired Firefly Studios in 2021. Devolver Digital serves as the publisher for Firefly Studios' games, providing distribution, marketing, and publishing support. This acquisition marked a significant partnership for the studio following the successful releases of Stronghold Crusader 2 and Stronghold: Warlords.
• Steam (Valve)coreChannel Partner/ Reseller/ DistributorSteam is the primary digital distribution platform for Firefly Studios' PC games. Stronghold series titles consistently perform well on Steam, with Definitive Editions achieving Top Sellers status. Steam provides multiplayer infrastructure, Workshop support for mods, and cloud saves.
• GOGminorChannel Partner/ Reseller/ DistributorGOG provides secondary DRM-free distribution for select Stronghold titles including Stronghold HD and Stronghold Crusader HD, offering players an alternative to Steam.
• Apple (iOS)coreChannel Partner/ Reseller/ DistributorApple iOS serves as distribution platform for Stronghold Kingdoms mobile, featuring redesigned touch controls and cross-play capability with other platforms.
• Google (Android)coreChannel Partner/ Reseller/ DistributorGoogle Play Store distributes Stronghold Kingdoms for Android devices, enabling cross-platform multiplayer with iOS, PC and Mac players.
• Content Creators (YouTube, TikTok, Streaming)coreGTM or Marketing PartnerFirefly Studios has a permissive content creator policy allowing creators to monetize gameplay videos through YouTube Partner Program and similar platforms. This drives significant organic reach and community engagement.

Scale indicators9 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Rebellion Developments: UK-based independent studio developing Sniper Elite, Zombie Army, and historical strategy titles. Direct peer as a comparable mid-sized UK game developer with deep franchise expertise and strategy/tactical overlap in their catalog.
• Petroglyph Games: Independent RTS developer behind Grey Goo, Star Wars: Empire at War, and Conan Unconquered. Most direct peer in terms of small-studio RTS with castle-siege and economy mechanics, serving the same strategy enthusiast segment as Firefly.
• Haemimont Games: Developer of Tropico, Surviving Mars, and Victoriana. Direct peer as a mid-sized strategy/simulation studio with similar long-running franchise IP (Tropico) and comparable scale and target audience of strategy/management enthusiasts.
• Paradox Development Studio: Internal studio of Paradox Interactive producing Crusader Kings, Europa Universalis, and Hearts of Iron. Direct peer in the historical/grand-strategy space, with Crusader Kings' medieval setting and castle/political management being particularly adjacent to Stronghold's thematic territory.
• Slitherine: Publisher and developer of historical and wargame strategy titles including the Matrix Games line. Direct peer in the historical/medieval strategy space with overlapping war-game and grand-strategy audiences and similar small-to-mid studio production model.
• Amplitude Studios: Developer of Humankind, Endless Legend, and the Endless series. Direct peer as a mid-sized strategy studio owned by a larger publisher (Sega) producing historical/4X turn-based and tactical strategy games for the same core audience.
• Creative Assembly: Developer of the Total War series, the dominant medieval/strategy franchise in the RTS/4X market. Directly comparable to Firefly Studios as both studios build historical real-time strategy games centered on combat, economy, and empire-building, with Total War: Medieval II being a long-standing reference point for Stronghold's audience.
• Relic Entertainment: Developer of Age of Empires, Company of Heroes, and Dawn of War. Direct peer in the historical RTS space serving a similar strategy-game enthusiast base, with overlapping medieval/castle-warfare content in Age of Empires II.

Broad incumbents

• Firaxis Games: Developer of Civilization and XCOM under 2K/Take-Two. Broad incumbent in the strategy genre operating at significantly larger scale; comparable as a long-running historical-strategy publisher with similar remaster/remake monetization patterns (Civilization I-VI editions).

Emerging players

• Hooded Horse: Publisher of strategy and 4X games including Manor Lords, Old World, and Terra Invicta. Emerging player publishing premium historical/grand-strategy titles with a strong indie/community focus, intersecting Firefly's medieval-strategy audience most directly through Manor Lords.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/fireflyworlds
• YouTubeyoutube.com/user/fireflyworlds
• Facebookfacebook.com/fireflystudios
• TikToktiktok.com/@fireflystudios

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Firefly Studios