The short answer
Porting a game means adapting it to a new platform: reworking controls and interface, hitting performance targets on new hardware, integrating platform features such as achievements and saves, and passing the platform's rules or certification. Mobile-to-PC and PC-to-Steam-Deck ports are the most common; console ports also require joining each platform holder's developer programme and passing their certification. The effort depends mainly on the engine and how platform-specific the original code is.
What changes when you port
| Area | What typically changes |
|---|---|
| Input | Touch to mouse and keyboard or controller, with remappable controls and correct button prompts |
| Interface | Layout, text size for TV distance, menus navigable with a controller |
| Performance | New memory, CPU and GPU budgets; frame-rate targets; loading times |
| Saves | Platform save systems and cloud saves |
| Platform features | Achievements or trophies, friends, invites, rich presence |
| Online | Platform accounts and networking services, cross-play rules |
| Business model | Free-to-play mobile designs may need rebalancing for premium PC or console |
| Store and ratings | Store pages, age ratings and platform content rules |
Common porting routes
Mobile to PC and Steam
The most frequent request. Beyond controls and resolution, many mobile games need pacing and monetisation changes for PC players. Our dedicated guide to porting a mobile game to PC and Steam covers it in detail.
PC to Steam Deck
Steam Deck runs most PC games, but a good experience needs controller support, readable text at its screen size and sensible performance settings. Valve's compatibility programme rates games, and our Steam Deck Verified guide explains the criteria.
To consoles
Each platform holder runs its own programme for developers: the Nintendo Developer Portal, PlayStation Partners, and ID@Xbox for independent developers on Xbox. Joining usually involves an application and agreement, after which you get access to development kits, documentation and tools under NDA. Before release, the game must pass the platform's certification against its technical requirements. Check that your engine version and licence support the target console.
The porting process
- Assessment: review the codebase, engine version, plugins and assets for anything platform-specific.
- Technical port: get the game building and running on the target.
- Input and UI: rework controls and interface for the new device.
- Platform features: achievements, saves, accounts and online services.
- Optimisation: profile on target hardware and hit frame-rate and memory targets.
- Certification or review: fix issues until the platform approves the build.
- Release: store assets, ratings, pricing and launch plan.
What makes a port easy or hard
| Easier | Harder |
|---|---|
| Built in a cross-platform engine such as Unity or Unreal | Custom engine or engine-specific hacks |
| Input handled through an abstraction layer | Touch logic mixed into gameplay code |
| UI built to scale | Fixed layouts for one screen shape |
| Few native plugins | Many platform-specific SDKs |
| Current engine version | Old engine version needing an upgrade first |
An engine upgrade is sometimes required before a port. For Unity projects, our Unity 6 upgrade guide covers what that involves.
Business questions before porting
- Does the game's audience exist on the new platform?
- Does the business model fit, for example free-to-play on console versus premium on PC?
- Will you support cross-progression or cross-play, and what do the platforms allow?
- Who will handle post-launch patches on each platform?
Controls and interface in detail
Controls are where ports most often feel cheap. A good port shows the right button prompts for the device in use, switches prompts instantly when the player changes from keyboard to controller, supports remapping, and never requires a mouse in a game played from the sofa. Menus need a clear focus highlight for controller navigation, and every screen must be reachable without touch.
Interfaces designed for phones often have small text and dense layouts. On a TV, text must be readable from several metres away; on Steam Deck, from a small screen held in the hands. Most ports scale UI by device and offer a text size option. Safe areas matter too: some TVs crop the edges of the picture, and phones have notches.
Performance targets by platform
| Platform | Typical target | Common bottleneck |
|---|---|---|
| Mid-range phone | Steady 30 or 60 frames per second, low heat | GPU fill rate, thermal throttling |
| PC | Scalable settings from low to high | Wide hardware range |
| Steam Deck | Steady 30 or higher with battery in mind | GPU and battery |
| Consoles | Fixed targets set with the platform requirements in mind | Memory and loading times |
Working with a porting partner
Original developers often hand ports to co-development studios so their core team can keep working on the next update. A good partner starts with an assessment and a fixed plan, keeps the original team informed, and returns code in a state the original team can maintain. Our articles on co-development and cross-platform development go further.
Porting with us
We port Unity games between mobile, PC, Steam and Steam Deck, and plan cross-platform builds from day one. See co-development or PC game development.
Sources: Nintendo Developer Portal · PlayStation Partners · ID@Xbox · Steamworks: Steam Deck · Unity: platform-specific information. Checked October 20, 2026.
Related: Co-development · PC game development · Get a quote
Originally published on A Plus Games Studio, a game, AR and VR development studio in Sacramento, CA.
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