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I’m building a cross-platform idle city-building game in Unity and need help turning a detailed concept into a playable prototype that feels polished on both iOS and Android. Core experience • Players earn money passively, spend it to place and upgrade realistic-looking residential, commercial, and industrial buildings, and watch their skyline grow. • Completing missions focused on unlocking brand-new map zones keeps progression moving. The moment a zone opens, fresh plots, unique building models, and higher revenue caps become available, encouraging continued play. • The art direction is strictly realistic: textures, lighting, and animations should evoke a living modern city rather than a stylised or low-poly world. Scope of work 1. Code the incremental economy loop in C# (offline earnings, upgrade multipliers, soft-currency balance). 2. Design a modular grid or node system for placing buildings that supports future content drops. 3. Create or integrate 3D assets that match a realistic style for at least three tiers each of residential, commercial, and industrial structures. 4. Implement the mission framework that checks requirements, grants rewards, and triggers the “unlock new area” sequence with camera fly-through and VFX. 5. Build a clean, touch-friendly UI (Unity UI Toolkit or Canvas) showing balances, timers, upgrade buttons, and a minimap toggle. 6. Produce test builds for both iOS (Metal) and Android (Vulkan/OpenGL ES), ensuring ≤60 MB initial APK/IPA and stable 60 fps on mid-range devices. Acceptance criteria • A single scene demo where a user can place, upgrade, and earn from all three building categories. • At least two map zones that unlock via the mission system. • Accurate income accrual while the app is closed, verified after a five-minute background test. • Builds submitted through TestFlight and Google Play internal testing with clear install instructions. If you’re comfortable owning both code and art integration—using Unity 2021 LTS or newer—and can iterate quickly with Git version control, let’s discuss timelines and milestones.
Project ID: 40554422
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Hi sir, Thank you for giving opportunity for biding... we have gone through your requirements and we can build your Idle City-Builder Game according to your exact requirements. Why You Need To Go With Us? And What Special you get with us. • Your vision = Our mission • Your idea + Our expertise = Winner on Web • Cutting edge web technology & design • Innovative, Cost effective & Customized service • Pragmatic Approach • Constant communication with clients • Consistent performance • On-time delivery • Maintenance of global quality standards • Your online business + Our experience = Your success Node, React, React Native / Flutter portfolio [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL]
$1,750 USD in 60 days
0.0
0.0
76 freelancers are bidding on average $536 USD for this job

With over a decade in the field, I am well-versed in full-stack app development for both web and mobile platforms. In particular, my mastery of Unity, C# and experience with iOS/Android systems make me an ideal candidate for your detailed idle city-builder game project. My multi-solution approach ensures all your specific requirements are met and allows me to deliver top-notch work on time. Your game's concept focusing on passive earning and strategic building is fascinating. As a developer, I am naturally inclined to create intuitive tools for players that allow them to take control of their unique game experiences, and in your case, that means providing a modular grid system that supports future content drops seamlessly. My previous projects have taught me the importance of a clean, effortless user interface, which will come in handy while developing a mobile-friendly touch UI for your game. Moreover my experience with Firebase real-time & Firestore will be valuable for implementing an accurate income accrual system while the app is closed, as per your specification. To wrap it up, not only do I have the skill set you require but my portfolio showcases my ability to bring concepts to life with aesthetic realism. I would be happy to discuss timelines and milestones so we can move forward with this exciting project together. Thank you for considering my application and let’s turn your vision into a transcendent gaming experience!
$500 USD in 7 days
7.8
7.8

Hi there, I've spent most of the last decade building mobile applications and game-like systems where progression, rewards, and long-term user engagement were in use. Looking at your requirement, the biggest part isn't building placement—it's making sure the economy, upgrades, missions, and new zone unlocks keep players progressing naturally without feeling too slow or too fast. I'll first build the core gameplay loop with offline earnings, currency flow, upgrades, and the modular building placement system. Once that foundation is solid, I'll implement the mission framework, map expansion, realistic asset integration, UI, and finally optimize everything so the game runs smoothly on both Android and iOS. I have a few questions and would request we connect once so we can discuss everything in detail. Based on that, I'll share a detailed implementation document covering the architecture, development phases, timeline, and milestones. Thanks, Rahul A.
$750 USD in 48 days
7.0
7.0

Hi, I can help turn your concept into a polished, cross-platform idle city-building prototype that feels rewarding from the very first session while being built on a scalable architecture for future content. Due to NDA restrictions, I can’t publicly share links to similar gaming projects here. However, I’d be happy to share relevant demos and project details once we connect via chat. My approach is to first build the core gameplay loop (economy, placement, progression), then integrate polished visuals, UI, animations, and optimization to ensure the prototype is both enjoyable and ready for future expansion. A few questions: 1. Do you already have the 3D assets, or should I source/create realistic models? 2. Will backend services be required for analytics or cloud saves, or is the prototype fully offline? 3. Do you have a Game Design Document, or should we refine the gameplay systems together during development? I’d love to discuss your vision and help build a polished prototype that can evolve into a successful long-term city-building game. Thanks! Purnima
$750 USD in 20 days
7.2
7.2

Hello, I have carefully reviewed your requirements and understand you need an experienced Unity game development team to build a polished cross-platform idle city-building prototype featuring an incremental economy, modular building system, mission-based progression, realistic 3D environments, and optimized performance for both iOS and Android. With 9+ years of experience and 200+ games successfully developed, we will deliver a scalable, well-optimized prototype with clean architecture, realistic visuals, smooth gameplay, offline progression, and a strong foundation for future content updates. You will get: 1. Quality optimized work 2. 100% client satisfaction 3. Fast delivery 4. Suitable pricing 5. Unlimited revisions 6. Complete NDA & IP protection (project security is our top priority) Available to start immediately and committed to delivering according to your project milestones and timeline. Come inbox & let’s get started. Best regards, Sohaib Pasn Games
$500 USD in 7 days
6.8
6.8

--- Unity Idle City-Building Game Prototype --- I can help build a playable Unity prototype for iOS and Android with the core gameplay loop and systems ready for future expansion. Here's my approach: → Develop the idle economy, offline earnings, missions, and building placement systems in Unity (C#). → Create or integrate realistic 3D assets, UI, animations, and map progression with unlockable zones. → Optimize performance for Android and iOS, prepare test builds, and manage Git-based development. → Deliver complete source code, documentation, and TestFlight/Google Play internal testing support. Flow Build City → Earn Income → Upgrade Buildings → Complete Missions → Unlock New Zone Question Do you already have the 3D building assets and environment models, or should they be included as part of the development scope? Let's connect... Thanks
$650 USD in 16 days
7.3
7.3

Hi I will be able to help you. Please message me so that we will have detail technical discussion. I have 9+ years of combined experience in Game Development for Web PC and Mobile and have expertise on Unity , Flutter, Android Java, Kotlin, Swift, Unreal Engine, Python Django, Power BI, Scikit-learn, Data Science AI ML, PyTorch, TensorFlow, SparkML , as well as React , Node , Typescript, JS framework, Nest js , Next js, HTML5 game with AR & VR concepts with Blockchain implementation. Please consider me and initiate a chat for further detailed discussion and understanding. Regards, Anju
$500 USD in 14 days
6.5
6.5

Hello There!!! ★★★★ ( Cross-platform Unity idle city-builder with realistic visuals and offline progression ) ★★★★ I’ve read your project carefully and understand you need a polished Unity prototype for iOS and Android featuring an idle economy, realistic city-building, mission-based progression, zone unlocking, and smooth performance. The focus is on creating a scalable foundation that can grow with future content. ⚜ Unity 3D game development in C# ⚜ Idle economy & offline earnings system ⚜ Modular building placement framework ⚜ Realistic 3D asset integration ⚜ Mission, rewards & zone unlock mechanics ⚜ Mobile UI/UX optimization ⚜ TestFlight, Google Play builds & Git workflow I have experience building Unity games with scalable architecture, clean C# code, and optimized mobile performance. My approach is to develop the core economy first, then implement modular placement, mission flow, UI, and realistic asset integration while maintaining 60 FPS on mid-range devices. I'll keep the project well documented and easy to expand for future updates. I would be happy to discuss milestones and bring your game concept into a polished playable prototype. Warm Regards, Farhin B.
$756 USD in 10 days
6.7
6.7

Hello, Your game has a great concept, and I would love to help turn it into a polished prototype. I have strong experience with Unity, C#, mobile game development, gameplay systems, UI, performance optimization, and cross platform releases for iOS and Android. I would be happy to schedule a quick discussion to review your vision, gameplay loop, art direction, and milestones. I am confident we can create an engaging prototype with smooth progression, realistic visuals, and a solid foundation for future content. I will share my portfolio in chat I look forward to hear from you. Thanks Best Regards, Mughira
$500 USD in 7 days
5.2
5.2

I can help bring your city-builder concept to a smooth, playable prototype that works well on both iOS and Android. For the economy loop, I’ll build reliable offline earnings with upgrade multipliers that keep the player engaged without confusion. The grid system will be modular and flexible, letting you add new building types or zones later without hassle. I’ve created similar realistic urban environments before, focusing on matching art styles and building layered upgrades that feel natural rather than gamey. For missions, I’ll set up a clear framework that triggers area unlocks and includes polished camera moves and visual effects to boost player excitement. A clean, touch-friendly UI will be a priority, balancing information and simplicity while supporting all core functions like timers and minimap toggles. I’ll optimize builds to stay under your size threshold and hit 60 fps on average devices. Would you prefer a node-based or grid-based building placement system to maximize flexibility? Also, do you have existing 3D art assets for the buildings, or should I source or create those realistically styled models? Ready to dive in and get your prototype running smoothly on test stores.
$750 USD in 7 days
5.3
5.3

Hello Dear! Greetings from Toriqul Global Solutions! We are pleased to introduce our company as a reliable and experienced provider of Web Design & Development services. Founded and led by Engineer Toriqul Islam, a B.Sc. graduate in Computer Science & Engineering from Rajshahi University of Engineering & Technology (RUET), our team brings over 10 years of industry experience. At Toriqul Global Solutions, we specialize in building modern, user-friendly, and high-performance websites that help businesses grow and stand out in the digital world. Our design approach focuses on simplicity, elegance, and functionality to ensure maximum user engagement. I have some question-- Please start a conversation to discuss your project. Technologies We Use: Custom Websites Development Using ======>Full Stack Development. 1. HTML5 2. CSS3 3. Bootstrap4 4. jQuery 5. JavaScript 6. Angular JS 7. React JS 8. Node JS 9. WordPress 10. PHP 11. Ruby on Rails 12. MYSQL 13. Laravel 14. .Net 15. CodeIgniter 16. React Native 17. SQL / MySQL 18. Mobile app development 19. Python 20. MongoDB We would be honored to discuss your project requirements and help bring your ideas to life. Thank you for your time and consideration. Warm Regards, Toriqul Global Solutions
$250 USD in 3 days
5.6
5.6

As a seasoned Unity Game and Mobile Application Developer with over nine years of experience, I possess the diverse skill set needed to bring your Idle City-Builder Game to life. My speciality in building 2D/3D games, integrating back-end services, and advanced gameplay features aligns perfectly with the scope of work you've outlined. My expertise in Unity 3D, especially in game optimization for performance stability and environment functionality, will ensure your game meets the stringent requirements of being cross-platform. Importantly, my proficiency spans both coding and art integration within Unity- an essential aspect for your project. My understanding of C#, ability to design modular grids or node systems supportive of scalability, and experience in creating high-quality 3D assets make me an ideal fit for this project. On top of my technical skills, I emphasize timeliness and collaboration. Utilizing Git for version control, we can iterate rapidly while maintaining a steady flow of communication as milestones are accomplished. In conclusion, my well-established technical competence and deep passion for delivering impeccable results positions me as the best candidate to transform your concept into a high-performing reality that players will love.
$2,500 USD in 25 days
5.2
5.2

With great excitement, I would love to bring your Idle City-Builder Game to life as it perfectly encapsulates my expertise in game design and development, particularly in Unity 3D. Over my 9+ years' experience, I have honed the skills necessary to transform your detailed concept into the polished reality you're envisioning for the game. My proficiency in C#, designing modular systems, integrating 3D assets with a realistic aesthetic, implementing mission frameworks with VFX, and optimizing for different platforms makes me the ideal fit to take on each aspect of your project. Not only am I well-versed in coding the incremental economy loop and creating touch-friendly UIs but also have meticulous attention to detail is needed to meet the strict criteria of your project. Building a clean UI with a focus on balance, timers, upgrade buttons, etc., is second nature to me. I understand that performance plays a crucial role in gaming experiences and can ensure both low initial APK/IPA size and stable FPS across mid-range devices -- Vulkan/OpenGL ES for Android and Metal for iOS. Moreover, being a seasoned developer proficient in using Unity 2021 LTS or newer and well-versed with Git version control, I guarantee professional work that aligns seamlessly with your needs. Embracing an iterative approach, I'm committed to delivering every milestone within the agreed-upon timeline while maintaining
$500 USD in 7 days
5.2
5.2

Hi, I’m excited about helping you develop your realistic city-building game in Unity for both iOS and Android. My experience with Unity 2021 LTS includes creating polished prototypes with modular systems, realistic 3D assets, and efficient UI design. I have a strong background in implementing incremental economy loops, mission frameworks, and ensuring smooth performance on mid-range devices, meeting the 60 fps and size constraints you specified. I am comfortable handling both code and art integration, and I use Git for version control to facilitate quick iterations. I understand the importance of delivering test builds through TestFlight and Google Play, along with clear instructions for installation. I’m confident I can help you realize your vision within your budget and timeline, delivering a demo with all core features, map zones, and income mechanics ready for testing. Best, Justin
$500 USD in 5 days
6.4
6.4

Your goal of a polished, cross-platform idle city-builder in Unity immediately brings to mind successful titles like "Tap Titans 2" and "Idle Miner Tycoon," which excel at balancing passive progression with engaging active gameplay loops and a satisfying visual hierarchy of growth. My experience in developing Unity games with similar core mechanics, focusing on intuitive UI and smooth performance across devices, aligns perfectly with your project's requirements. I propose a phased approach to prototype development. Phase 1 will focus on core economy simulation: implementing passive income generation, building placement/upgrade systems with clear cost/benefit analysis, and the foundational mission/zone unlock logic. We'll utilize C# scripting for all game logic, leveraging Unity's UGUI for UI elements and ensuring efficient asset management for optimal performance on mobile. Phase 2 will integrate the requested art direction, ensuring a cohesive and visually appealing experience, and rigorous testing on target iOS and Android devices to identify and resolve any performance bottlenecks or platform-specific issues. How are you envisioning the integration of the art direction into the early prototype to best inform gameplay feel, and what are your initial thoughts on the key performance indicators you'll use to measure the prototype's success? I'm eager to discuss how we can bring your vision to life.
$614 USD in 21 days
4.2
4.2

I can develop your cross-platform Unity idle city-building game prototype, handling both core systems and implementation details. I have experience with Unity 2021+ and C# gameplay programming, including economy systems, grid-based placement, and scalable architecture for mobile games. I will build the incremental idle economy loop (offline earnings, upgrades, multipliers), a modular grid/node placement system, and a mission-driven progression framework with zone unlocks and camera/VFX sequences. I can also integrate or create realistic 3D building assets and ensure consistent visual quality across residential, commercial, and industrial tiers. Additionally, I will implement a clean mobile UI, optimize performance for iOS and Android, and deliver stable builds via TestFlight and Google Play internal testing, fully meeting your 60 FPS and size targets.
$250 USD in 3 days
4.4
4.4

Hello! We can build a polished Unity prototype for your city-building game. 1. Do you already have the 3D assets, or should we handle integration as well? 2. Which part should we prioritize first: economy, building placement, or missions? — About us We are dZENcode – a full-cycle IT company for digital product development: from design and programming to integrations and post-release support. We build projects from scratch and also work on existing solutions that need further development, improvements, or technical support. You can find detailed information about our services and rates on our official website: https://dzencode.com. Please review it – after that, we can discuss the details and agree on the next step. ⚠️ After clarifying all details, we will define the scope, the suitable cooperation format – task-based, outsourcing, or outstaffing – and the final cost. Projects are guaranteed to reach release with us: • 10+ years providing IT services; • 90+ in-house specialists; • 250+ public reviews since 2015; • We support products under SLA after launch; • We work under NDA and a company contract!
$500 USD in 7 days
4.3
4.3

As an experienced game developer fluent in C#, proficient in 3D modelling, and focusing mainly on mobile app development, I believe I have the skills necessary to turn your detailed concept into a highly polished playable prototype that aligns with your vision for a city builder game. With my knowledge in Unity, particularly the Unity UI Toolkit and Canvas, I can assure you of a clean, touch-friendly UI that not only effectively showcases balances, timers, upgrade buttons but also includes a minimap toggle. Moreover, my previous experience with web scraping has honed my ability to build efficient and scalable systems, something that will be essential while coding the incremental economy loop. I am well-versed with Git version control as well and can assure you of fast iterations throughout the project. Lastly, with a focus on delivering high-quality code and exceeding client expectations, I am committed to ensuring not only the overall stability of builds across iOS and Android platforms but also an APK/IPA file size within 60MB to optimize user downloads. My proposal isn't limited in its potential for success but rather built on tangible skills you're in need of which makes me an excellent choice for this project.
$500 USD in 7 days
3.7
3.7

⚠️ If you're not happy, you don’t pay. ⚠️ Hi there, thank you for sharing your detailed project brief. I can build your cross-platform idle city-building game in Unity with a premium and realistic design. I will deliver: • Incremental economy loop in C# • Modular grid system for building placement • Realistic 3D assets for residential, commercial, and industrial structures • Mission framework with area unlock sequences • Intuitive Unity UI for a seamless user experience • Optimize for iOS (Metal) and Android (Vulkan/OpenGL ES) with smooth performance You will also receive: • Test builds for both platforms • Detailed documentation • Post-launch support I am confident I can execute your vision professionally and efficiently. Looking forward to discussing timelines and next steps. Best regards, Chirag
$400 USD in 7 days
3.4
3.4

Hey there, I'm Vishal Maharaj, a Game Design and Development expert with 25 years of experience in Perth, Australia. I am passionate about taking on your Idle City-Builder Game project. I understand the core experience you aim to deliver with the game and how important it is to maintain a realistic art direction throughout. I would approach the project by coding the incremental economy loop in C#, designing a modular grid system, integrating realistic 3D assets, implementing the mission framework, creating a user-friendly UI, and ensuring smooth performance on both iOS and Android devices. Let's discuss further details. Feel free to initiate the chat. Cheers, Vishal Maharaj
$500 USD in 5 days
3.2
3.2

Dear Client, I’m an experienced full-stack and game developer with 10+ years of experience building scalable applications, interactive systems, and mobile solutions using C#, Unity, and modern development workflows. I understand you need a polished cross-platform idle city-building prototype featuring an incremental economy, modular placement system, realistic 3D environments, mission-driven progression, offline earnings, and optimized iOS/Android deployments. I have experience developing gameplay systems, progression mechanics, UI frameworks, asset integration, and performance-focused mobile applications with Git-based collaboration and iterative development practices. My expertise includes Unity, C#, mobile optimization, UI systems, 3D asset integration, Git, and cross-platform deployment. Feel free to share additional details or ask questions. I’m happy to discuss milestones and timelines. Looking forward to hearing from you. Best regards, Md Ruhul
$250 USD in 6 days
4.9
4.9

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