Custom C++ codebases are preventing your game from growing
A game built on Custom C++ codebases eventually starts to slow down business growth — not because the code is bad, but because the market moves faster than it is updated. While competitors release new seasons, platforms, and mechanics, you spend weeks making even small changes.
Players don’t see that — they see delays, a lack of fresh content, and leave for those who respond faster.
The problems with the game are usually the same: the legacy codebase requires narrow specialists who are hard to find, and attempts to add new functionality or release a mobile version turn into a long and expensive project.
As a result, the game loses market share, and you lose potential revenue. Instead of growth, you spend resources supporting something that no longer delivers the same results.
Porting the game to Unity removes this barrier. You get a modern environment where updates and new platforms are a standard process, not a feat.
The same product can be easily adapted for smartphones, consoles, and PCs, allowing you to expand your audience without a proportional increase in development costs.
Moving to Unity is not changing a tool for the sake of it, but a way to make the game flexible and competitive again.
We help you move from Custom C++ codebases to Unity without stopping the project and without losing the accumulated game logic. We preserve what already works, rebuild what gets in the way, and bring the game up to the update cadence that modern players expect.
The result: the legacy codebase stops being a bottleneck and becomes the foundation for new releases, online growth, and repeat purchases. The game can grow again.
What you get after porting the game
Porting a game to Unity from a proprietary C++ codebase is not a technical migration, but a strategic business move. You move the project from a closed architecture that keeps you on one platform to a flexible ecosystem where every update reaches all players at the same time. This is where the main benefits for your studio and your users begin.
The first and most obvious is audience growth. After moving to Unity, the game gains access to mobile devices, consoles, and web versions without rewriting the project. Each new platform is a new sales channel and a new stream of players.
Instead of one niche, you occupy several markets, thereby increasing revenue without additional marketing spend.
The second benefit is simplified maintenance. Instead of keeping separate teams for each version, you work with a single codebase. A bug fix is made once and immediately appears on all platforms. This reduces reaction time to player complaints and lowers maintenance costs. Less routine means more time for product development.
The third is faster update production. Unity provides proven tools for building, testing, and publishing. You stop spending weeks on technical tasks and release content, events, and seasonal activities faster. Players see that the game is evolving and stay with you longer.
As practice at truetech.by shows, such a transition pays off within the first months: you get a stable product on new platforms and growth in key metrics.
You keep the gameplay, balance, and assets, taking from porting the main thing — market expansion and a modern technology base.
Work formats: from audit to full porting
Porting a game originally written on Custom C++ codebases is not always a full migration. Sometimes an audit is enough to see the real risks and scope of work, and sometimes a partial port is enough to reach a new platform faster.
At truetech.by, we select the format based on your business objective: you pay only for what delivers results.
Below are three formats that cover typical scenarios: from express assessment to full porting.
| Format | For whom | What the client gets |
|---|---|---|
| C++ code audit | You are planning to port but don’t know the scope of work and hidden problems | A transparent plan, timeline and risk assessment, and a recommendation on whether to port or rewrite |
| Partial porting | You need to quickly release a version for a new platform or test demand | Transfer of core mechanics and game logic without spending on secondary elements |
| Full port to Unity | The game already generates profit and needs a new stage of development and audience expansion | A ready cross-platform version, modern code, support, and further product development |
Which format to choose depends on the goal. If you want to quickly test a hypothesis, partial porting is enough. If the game is profitable and needs to scale, a full port provides a stable foundation for growth.
An audit, meanwhile, helps avoid unnecessary costs: you get a clear estimate and an understanding of where the project is heading.
We support every format at all stages — from the initial analysis to release — so you never face a foreign codebase alone.
How the work on your project progresses
Porting a game is not about transferring code but business results: preserving player interest, familiar mechanics, and monetization.
That is why we break the porting process into clear development stages and always start with a brief — you tell us about the task, audience, and deadlines.
For projects with a proprietary C++ codebase, we immediately assess the scope of the transfer and the risks so that you get a realistic plan and an effort estimate.
- Brief and goals. We record the tasks, audience, platforms, and key success metrics. You learn the timeline and scope before the start.
- Source code analysis. We examine your C++ codebase, identify game mechanics and content. You get a list of what will move unchanged and what will require rework.
- Plan and approval. We propose a step-by-step plan with demo dates and checkpoints. You approve the budget and understand what you are paying for.
- Transfer and adaptation. We move the game functionality to Unity, preserving the logic, style, and controls. You get a working build for initial tests.
- Intermediate demos and revisions. After each major block, we show a playable version. You provide adjustments while changes are still inexpensive.
- Game release. We run final testing on target devices and prepare release materials. You receive a published game.
- Support. We stay in touch after release: fixes, updates, adaptation to new platforms. Your game continues to run and grow.
In the end, you get not just a ported game but a manageable project with clear milestones and minimal risks. We take on the engineering complexity — you keep control and an understanding of the process.
What is included in the delivery — full list
When you order porting, it’s important to understand exactly what you will get on the output. At truetech.by, we deliver not just a finished game but a complete set for independent work: source code, documentation, training, and support.
This means that after release you are not dependent on us and can develop the product with your own team.
- Full source code of the project in Unity, including the ported game logic — you remain the owner of all intellectual property.
- Detailed documentation of the architecture and key decisions: your specialists will quickly understand the new code without the help of third-party contractors.
- Training for your team: we walk through the architecture and show how to make changes and add new content.
- Ready builds for target platforms and a configured update release process — you ship patches and versions without our team.
- An operating manual for technical support and administration of the game after launch.
- Post-release support: we answer questions, fix bugs, and assist with refinements during the agreed period.
This approach covers the main risks — loss of knowledge and dependence on a contractor. You get not a “black box” but a manageable product that is easy to scale and adapt to new tasks. If your team has questions after reviewing the code, we stay in touch and help with implementation.
Case study: 3x growth in downloads after porting
A mobile studio, PlayCraft, approached us with a strong game locked inside a proprietary C++ codebase. The project performed well at launch, but only on one platform: every update required weeks of manual work, and the game would not build for new devices at all. Features were delayed, players left, and the team was drowning in technical debt.
We rewrote the key modules in Unity, preserving the gameplay and the entire project economy. The game became cross-platform — it runs on most modern devices without code changes.
Releasing updates now takes days instead of months, so the studio is again keeping up with audience expectations.
Results in numbers
In the first quarter after release, downloads grew threefold, and revenue grew by two and a half times. Player retention increased by 18%, and the average session length went up. Repeat purchases began generating 40% more revenue — players returned and started paying.
This case is a clear example that moving to a modern engine should be seen not as technical work but as an investment in growth. We take on the entire porting process and make sure the product earns no less after the move, and usually more. We handle the same tasks for clients across different game genres.
What if critical C++ code doesn’t fit into Unity?
This situation is familiar: a company has spent years developing C++ code. It is stable and performs critical tasks, but the new platform requires Unity. A reasonable question arises — will all that work have to be thrown away and started from scratch? Our answer is no; that is the worst-case scenario and it is easy to avoid.
We don’t rewrite existing code; we embed it into the new architecture. Your C++ remains the core of the game, while Unity handles the interface and modern presentation. To do this, we write a clean integration layer that connects both parts.
All proven business logic — calculations, algorithms, rules — continues to work as before, without loss of quality.
This is especially important when there are specific requirements where part of the logic cannot be moved to another language without losing performance. For example, complex mathematical models or real-time modules.
We leave them in their original form, and Unity accesses them through a well-designed wrapper. For you, this means: performance is preserved, and the team does not spend months rewriting what is already debugged.
If you worry that integration will complicate the project — in practice, it’s the opposite. We handle the technical part: we design the integration, verify it at every stage, and provide transparent tests and clear results. You see how the game gradually takes on a new look without losing stability.
Tasks like these are routine for us, so we’ll answer directly: critical C++ code that “doesn’t fit” into Unity is not a dead end but a problem with a clear solution. We deliver it turnkey, preserving your development investments and sparing the team unnecessary stress.
Frequently asked questions and client concerns
Porting a game from a proprietary Custom C++ codebase to Unity sounds risky: it seems like you’ll have to rewrite everything, stop development, and lose the mechanics you’ve built up. In practice, these fears are dispelled by proper process organization.
We have already ported projects of varying complexity and know how to preserve both functionality and timelines.
Is porting a complete rework of the project?
No. We don’t transfer “from scratch” — we adapt the existing logic to Unity. The mechanics, balance, and team assets remain; only the technical architecture changes. You get the same product on a more flexible platform.
What if compatibility problems arise?
First, we check the codebase for compatibility and identify bottlenecks. Then we port in modules, testing each stage. You see results gradually and don’t get a “black box” at the end.
Will development stop during the transfer?
No. We carry out porting in parallel with your current tasks, and the Unity launch happens in stages. You don’t stop development and can bring in new specialists without a long downtime.
If you’re not sure whether porting is right for your project, send us a description of the game and the current codebase. We’ll assess the risks, tell you what can realistically be preserved, and propose a plan with stages and timelines.Ready to discuss moving to Unity?
Moving from a proprietary codebase to Unity is not just a technology upgrade; it is an opportunity to accelerate update releases, simplify maintenance, and expand your team. But any migration carries risks: missed deadlines, unexpected expenses, data loss. We will help you transition safely and with a clear outcome.
Leave a request for a free project assessment — we will analyze your current codebase and prepare an honest conclusion: what can actually be transferred, what stages will be required, and how long it will take. You will get a basis for making a decision, with no costs and no obligations.
What happens after you submit a request:
- You submit a request — we contact you within one business day.
- We conduct a free assessment: we examine the codebase, project structure, and your goals.
- We prepare a transition plan with estimated timelines and cost — no hidden items.
- We discuss the project: review risks, answer questions, clarify details.
- We provide strategy advice — which transfer approach will yield the best result.
- You make a decision, and we begin work with clear stages and regular reports.
This way, you lock in the benefits of the transition — development speed, independence from niche specialists, and access to a broad market of Unity developers. No need to guess whether the solution is right — you’ll have a plan in hand. Start with a simple request, and we’ll take care of the rest.