Porting a Game from Defold to Unity

Why a Defold project is losing revenue and how to fix it

A Defold project was once fast and lightweight, but today it cannot keep up with the market. While competitors release updates every week and experiment with new mechanics, you get stuck for months in refinements.

Audiences quickly lose interest in a game that isn’t evolving — and move on to more dynamic projects. Along with players, revenue also slips away.

An outdated engine becomes an expensive pleasure: every new feature requires workarounds, integrating with modern monetization and analytics services turns into a trial.

Ads and in-app purchases perform worse than they could, and the team spends effort not on improving the game but on solving technical problems. Add to that the shortage of Defold specialists on the market — and you get a scenario where the project slows down and the budget grows.

The solution is to migrate the project to Unity. Porting a game from Defold to a modern engine gives you back development speed and access to an ecosystem of tools already used by successful competitors.

Unity offers flexibility: you can quickly add new modes, platforms, and mechanics without hitting the limitations of old code.

Project migration is not rewriting from scratch but a careful transfer to a new technology base. We preserve game logic, content, and existing work, betting on what already works.

As a result, you get an updated game faster than if you started from a blank page — which means you regain momentum sooner and start earning more.

After the migration, you will be able to ship updates regularly, introduce new mechanics, and explore new platforms without stress and overtime. The project starts growing again, and you stop losing players because of an outdated engine.

If you want to find out how migrating a Defold project can change your business, we are ready to demonstrate it on your own game.

What business benefits game porting brings

When a game already brings in its first users, it's important not to rest on your laurels. Porting to Unity expands the product’s potential: you gain access to new platforms, audiences, and use cases. This is not just a technical update, but an investment in long-term growth and business stability.

The first benefit is player retention. Thanks to porting, users can play on different devices without losing progress or purchases. This reduces churn and boosts loyalty: the more platforms a game supports, the harder it is for a player to switch to competitors.

The second benefit is new platforms and greater reach. Unity unlocks access to more app stores and device types. When a game appears where it wasn’t available before, you attract audiences that physically couldn’t become your customers. Each new storefront is an additional source of installs and revenue.

The third benefit is brand awareness. Porting and entering a new platform become a news hook for press, bloggers, and streamers. The game gets extra attention without advertising costs.

This strengthens the brand and sets you apart from competitors who are in no hurry to expand their presence.

In the end, porting directly improves the return on development investment. Audience growth, player retention, and awareness together create a steady income stream.

You don’t spend budget on building a new game from scratch; instead, you effectively develop a proven product, recovering your investment faster and with lower risk.

Porting formats for your project’s goals

When choosing a porting format, you are not determining the scope of technical work but the level of our responsibility for the result. We have prepared three options — from a quick launch to full post-release support.

Each one addresses a specific business goal: test a hypothesis, get to a platform on time, or hand the project over to reliable hands for years.

What affects the choice of format? First of all, the game’s lifecycle and your plans for it. If it’s a short campaign or an experiment, “Quick Launch” is enough. If the game generates steady revenue and you are investing in its growth, it makes more sense to choose Full Support.

In any of the three options, we take on the technical complexity of platform and device compatibility, while you keep control of the product and its development.

Before work begins, we audit the source code, lock in timelines and budget, and deliver the result with documentation and training for your team. Whichever option you choose, you get a working game — not an abstract “code migration.”

How porting works: stages and timelines

Game porting is not just “moving code from one platform to another”; it is a full-fledged project with its own risks and deadlines. We structure the process so that at any moment you understand what’s happening, how long it takes, and when the result will be ready. No “surprises” in the final week — only an agreed plan and clear stages.

1. Brief and project immersion. You tell us about the game’s mechanics, audience, and goals. We capture the requirements, study the source code, and determine what is needed for a lossless transfer.
2. Audit and scope assessment. We check which mechanics can be moved as-is and which need to be adapted for Unity. The output is a plan with a task list and realistic timelines.
3. Work plan approval. We agree on stages, milestones, and reporting format. You see the schedule, understand when intermediate versions will be ready, and can adjust priorities.
4. Development and mechanic migration. We gradually transfer game scenes, UI, and logic. At every stage, you receive a playable build — you can look, touch, and provide feedback.
5. Testing and polishing. We verify compatibility with different devices, optimize performance, and eliminate any issues found. You get a stable version that won’t let you down at release.
6. Launch and post-release support. We help with store publishing and stay in touch to fix possible problems and make adjustments.

Timelines and control

A transparent schedule is part of our responsibility. So you can see in advance how the project is progressing, we lock down timelines in a table:

Exact timelines depend on project complexity and content volume, but you always see what stage we are at and what comes next.

Every step is coordinated with you — so you keep control over the process and the result, rather than receiving a “black box” with a finished game at the end.

What’s included in the deliverable after porting

After the project is handed over, it’s important for you to get not just a working build but a complete package your team can work with without our daily support.

That’s why the deliverable is not “the game by itself,” but a neatly packaged result — from code to instructions — where every element answers the specific question: “how do we maintain and develop this later?”

Here is what you get after porting:

• Ready-made Unity build — the game runs on target platforms and fully matches the functionality of the original. You check it on your own device and see that business logic and user mechanics are preserved.
• Commented source code — a clear project structure so your developers can quickly understand and make changes without the “black box effect.” Everything is named and organized according to current Unity development practices.
• Project documentation — a description of the architecture, key system logic, dependencies, and settings. This is your reference in case you change contractors, hire in-house staff, or onboard a new team.
• Instructions for your team — step-by-step procedures for launching the project, building updates, and releasing versions for each platform. Your developers, testers, and project managers can maintain the product by following the instructions instead of keeping all knowledge in their heads.
• Configured settings and parameters — everything responsible for the game’s behavior in different conditions (environment, server connections, analytics) is already defined and verified. Need to change a server URL or analytics key? Open the settings, change one field, and you’re done.
• Quality assurance protocol — a set of automated tests and a checklist confirming that the ported game works stably, does not lose user data, and correctly handles key scenarios. This is your safeguard against regression in future updates.
• Result guarantee — after the handover, we fix errors discovered during the agreed period for free and consult your team during implementation. You are not left alone with new code.

Such a package means that porting is not just rewriting a project but delivering a working tool your team can manage independently.

You pay once, get the product, and keep control over its evolution — from small tweaks to new features — without necessarily involving us and without spending time on a “ramp-up.” If any questions come up while your team gets familiar with the deliverable, we’re available and happy to help make the transition to Unity as seamless as possible.

Case study: how we migrated a game from Defold to Unity

A developer of the mobile puzzle game “Labyrinth of Fate” approached us — the game had generated stable revenue for several years and had a regular audience.

But problems kept piling up: update releases were delayed because of complex refinements in Defold, and users complained about crashes and long loading times. Technical debt grew faster than new levels were added.

We audited the project and suggested migrating the game to Unity. For the client, it was critical not to lose anything: player progress, paid purchases, saves, and the entire in-game economy had to move over without losses.

The migration took two months — the old versions kept working until release, so sales and user activity never stopped.

What the migration showed

A month after launch on the new platform, engagement grew by 35%: sessions became longer, and the share of players returning the next day increased. The technical failures people used to report to support almost disappeared — the number of tickets dropped by half.

This allowed the “Labyrinth” support team to focus on real conversations with players instead of boilerplate replies about bugs.

In addition, development of new levels sped up by 1.5 times. The client’s team stopped spending time on workarounds and got tools that let them ship new mechanics faster.

Why this wasn’t a one-off engagement

After release, we stayed on for support. Six months later, the client entrusted us with developing their second game — this time built directly on Unity.

A repeat order is, for us, the clearest sign that the migration solved a real business problem rather than simply changing the technology.

What if the game has non-standard mechanics?

Yes, porting is possible for any game logic — and the more unusual the mechanic, the more reason to trust its migration to a team that understands the original project.

Non-standard mechanics are not a limitation but a set of specific requirements that can be transferred to a new platform without losing the game experience.

It’s important to understand: we don’t transfer on-screen images or files, but the behavior of the game.

Custom logic, non-standard physics, unique object interactions, special win conditions, or procedural generation — all of this can be described in terms of algorithms and states.

That’s why, when porting from Defold, we recreate not “how it looks” but “how it works”: we analyze the source code, capture all scenarios, including rare and non-obvious ones, and then move them to Unity while preserving the feel of the game.

For us, a game’s unique features are not an obstacle but a technical specification. Specific requirements such as unusual controls, asynchronous events, or complex mathematical models are adapted to the target platform according to its capabilities.

As a result, the client gets a game that behaves exactly like the original, even if its mechanics have no equivalent on the market.

Our experience porting projects with varying degrees of “non-standardness” lets us guarantee the result. We test every mechanic against the original logic, and if something cannot be replicated literally, we offer an equivalent alternative that doesn’t break gameplay.

For you, this means your investment in the original idea won’t be wasted, and the game will gain a new life on Unity while retaining its uniqueness.

Frequently asked questions about project porting

Any project migration comes with questions: will players be lost, how long will it take, and what could go wrong. We answer honestly, because behind every word is experience from dozens of ported games and post-release support.

How long does porting take?

Usually a few weeks for an average project. We lock down the timeline in the plan; you can see the stages and plan the release.

Will player progress and purchases be preserved?

Yes. We design the data migration so the player doesn’t notice the transition: level, inventory, currencies — everything stays. Users don’t start over, so there’s no wave of negative reviews.

What about support after launch?

After release, we stay in touch: we fix bugs, monitor stability, and help with updates. Support is included in the contract — you don’t end up alone with the new engine.

Let’s discuss migrating your game in a personal conversation

Porting a game from Defold to Unity is not just code migration; it’s an opportunity to open the project to a new audience and monetization tools. But without an accurate scope assessment, it’s easy to slip into prolonged development and unnecessary costs.

That’s why we suggest starting with a personal conversation: we’ll analyze your game, calculate realistic timelines, and advise which elements should be reused and which are better reworked.

We work with these tasks on a regular basis, so we immediately see pitfalls and growth points. Fill out the porting request, and at the very first meeting you’ll get a consultation and an assessment of your project.

This is free and doesn’t obligate you: first you learn the numbers and the plan, then you decide whether to move forward.

Here’s what a conversation with our team will give you:

• You’ll understand which mechanics can be transferred without losses and where adaptation is needed.
• You’ll get a stage-by-stage timeline estimate — no surprises in the middle of the project.
• You’ll learn how the migration will affect performance and player experience.
• You’ll compare porting costs against the potential growth in audience and revenue.
• You’ll be able to ask technical questions and get honest answers.
• You’ll see examples of similar projects and how we solved typical problems.

You can reach the team in one click — leave your contacts in the form below, and we’ll suggest a time for a call within one business day. After a short conversation, you’ll get a clear action plan and a preliminary estimate. This is the best way to understand what porting will bring to your specific game.