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I’m planning an action-adventure title for Android where players can genuinely earn money by finishing missions or special challenges. The core loop is simple: explore, clear objectives, and receive a reward that can be cashed out or converted to vouchers—whatever technical route you suggest as most secure and compliant. Key gameplay idea A seamless, open-world map should invite exploration. Hidden paths, dynamic weather, and environmental puzzles will keep players busy between missions, but the primary incentive is that every completed quest credits their wallet. What I need from you • A fully playable Android build (Unity or Godot are fine—propose what suits the scope) • Source code with clean architecture so new levels and events can be slotted in later • A lightweight back-end module that tracks mission completion and triggers the payout logic • Basic UI for the in-game wallet and withdrawal request flow • Short technical doc explaining how to add more missions, update rewards, and maintain security Acceptance criteria The APK must run smoothly on mid-range devices (Android 8.0+), load the open-world map in under ten seconds, and save earnings accurately after each completed mission—even if the user forces the app to close. If this brief feels clear, let me know your preferred engine and estimated timeline, and we can lock in the milestones.
Project ID: 40645337
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92 freelancers are bidding on average $19 USD/hour for this job

Drawing from over a decade of experience in Web and Mobile(Android & iOS) applications, I understand the core complexities involved in creating an interactive and rewarding Android gaming experience. My hybrid app development skills using platforms like Flutter and React Native will ensure a seamless build that can efficiently load your open-world map in under ten seconds. Moreover, leveraging my expertise with Firebase/FCM/Push Notification and GPS/Google Map APIs, I can optimize your game's backend to accurately track mission completion, trigger payout logic, and maintain security even if the user force closes the app. Moreover, I pride myself on being a dynamic problem solver who offers personalized solutions. Not only will I deliver a fully playable Android build using your preferred engine (Unity or Godot), but also provide you with a lightweight back-end module for efficient mission tracking and payout function. I’ve got everything you're looking for— technical competence, mindful timeline planning, constant communication and unwavering support till job completion. With me on board as your Full-Stack Software Engineer, Android Adventure Earnings game will empower users to enjoy exciting missions while accumulating real-world value
$20 USD in 40 days
7.8
7.8

Hey there, I have carefully reviewed your project requirements. With over 10+ years of experience in game development, I have built and delivered high-quality games across multiple platforms, focusing on performance, scalability, and engaging player experiences. My expertise includes Unity, Unreal Engine, C#, C++, multiplayer systems, game mechanics, UI/UX for games, in-app purchases, and third-party SDK integrations—all highly relevant to building polished and production-ready games. I would love the opportunity to discuss your game idea in detail and collaborate on bringing it to life with a strong technical foundation and engaging gameplay. Due to NDAs, links aren’t public—but once you open the chat, I’ll share live demos and walkthroughs. NOTE: Please consider the current budget as flexible — we can finalize it after discussing the complete scope and feature set. Thanks & Regards, Kajal
$20 USD in 40 days
7.2
7.2

Hello, I have carefully reviewed your requirements and understand your vision for an Android action-adventure game featuring an open world, mission-based progression, environmental exploration, and a secure reward and withdrawal system. With 9+ years of game development experience and 200+ successfully delivered games, I have extensive experience with Unity, C#, Android development, open-world systems, mission frameworks, backend integration, wallet systems, data persistence, and mobile optimization. You will get: 1. Quality optimized game development 2. Clean and scalable game and backend architecture 3. Secure mission and reward tracking 4. Smooth Android performance and persistence 5. Fast milestone-wise delivery 6. Complete NDA & IP protection I can structure the mission and reward systems so new quests, events, and reward configurations can be added efficiently while keeping the architecture secure and maintainable. Available to start immediately and committed to delivering regular progress updates. Come inbox & let’s get started. Best regards, Sohaib Pasn Games
$20 USD in 40 days
6.8
6.8

Hi, It will be an honor for me to work with you. I have got 12 years of android application development experience (Kotlin, Java, Jetpack Compose). Lets discuss this in detail and get this started. Looking forward to hear from you.
$20 USD in 40 days
6.9
6.9

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
$15 USD in 40 days
6.6
6.6

Dear , We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time. We are 25 years in this business and our technical specialists have strong experience in Mobile App Development, Android, Unity 3D, Game Development, Backend Development, Android App Development, Unity, Game Programming and other technologies relevant to your project. Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews. Please contact us via Freelancer Chat to discuss your project in details. Best regards, Sales department Tangram Canada Inc.
$25 USD in 5 days
7.5
7.5

Hi, Open-world Android games with real-money payouts fail because client-side mission tracking is trivially exploitable. Your earnings accuracy depends entirely on server-side validation that verifies gameplay telemetry, not just completion flags. I build the backend to cross-reference movement patterns and time-on-task before crediting any wallet to prevent automated farming. Will your payout system require identity verification (KYC) for withdrawals, or are you targeting a voucher-only model to bypass financial regulations?
$15 USD in 40 days
5.7
5.7

Hi, I’ve reviewed your requirements and understand that you need an Android action-adventure game with an open-world experience, mission-based rewards, wallet tracking, and secure withdrawal functionality. I can build this using Unity, with a scalable architecture for open-world exploration, missions, dynamic weather, puzzles, player progress, wallet balance, reward tracking, and withdrawal requests. The backend will securely validate mission completion and earnings so rewards cannot be manipulated from the client side. I’ll also optimize the game for Android 8.0+ and mid-range devices, ensure earnings persist safely after app closure, and provide clean source code with documentation for adding future missions and rewards. I have 10+ years of experience in mobile, backend, API, and game-related development and can suggest a secure and practical payout approach based on your target market. Let’s discuss the reward/cash-out model and milestones. Thanks, Invoke Tech
$15 USD in 40 days
5.6
5.6

With my extensive 9+ years of experience as a Unity Game and Mobile Application Developer, I can guarantee that I'll deliver a high-performance and seamless Android adventure game as per your vision. Given my history in developing both 2D and 3D games using Unity for multiplatform including Android, I am comfortable handling the complex demands of the project. My expertise isn't just limited to game development; in fact, I have strong proficiency in backend services and integrating monetization systems, which are key to your project's success. From firebase integration to payment gateway implementation like Cashfree and Razorpay, I'm familiar from start to end with every component necessary for your app's efficient functioning. Additionally, should you need assistance with updates, added levels or events, my clean architecture principles ensure that new features can be easily slotted in while maintaining security. To top it off, I'm also familiar with optimizing game performance for mid-range devices ensuring smooth gameplay on Android 8.0+. Feel free to lock in milestones and we'll get right into delivering a game that exceeds your players' expectations!
$20 USD in 40 days
5.2
5.2

hello there , I can develop your Android action-adventure game with a secure mission/reward system, designed so the gameplay and earning mechanics can scale with future levels and events. Key Deliverables Open-world exploration and mission system Dynamic map, weather, hidden paths & environmental puzzles Quest/challenge completion tracking Secure in-game wallet and reward balance Withdrawal/voucher request workflow Backend for missions, rewards and transaction records Server-side reward validation to prevent cheating/exploitation Reliable progress/earnings persistence Optimized Android APK for Android 8+ Modular architecture for adding future missions/events Documentation for missions, rewards and maintenance Recommended Engine: Unity, due to its mature Android optimization, open-world tooling and scalable content pipeline. I would build the reward system server-authoritatively, so players cannot simply modify local data to generate earnings. I would also recommend reviewing the planned cash-out/voucher model early because real-money rewards can introduce payment, tax, consumer-protection and app-store compliance requirements depending on the countries and reward mechanism. The project can be delivered in milestones: Game Design ,World/Gameplay ,Mission System ,Backend & Wallet ,Reward/Payout Flow ,Optimization ,QA ,Final APK & Source Code looking forward for your response thanks
$15 USD in 40 days
5.2
5.2

I can help you by building this as a server-authoritative system rather than a client-trusted one. That’s the only way to make the earnings model secure. I’ll build the game in Unity with a clean, modular architecture. The key engineering decision is that mission completion will be validated on a lightweight backend (Node.js or Firebase Functions), so the client can’t spoof a reward. The backend handles the payout logic and ledger, while the game client just handles the UI and gameplay. For the open-world map, I'll use asynchronous loading with addressables to hit your 10-second load target on Android 8.0+ devices. I’ll also implement transactional save states, so earnings persist even if the app is force-closed mid-mission. An anti-tamper layer will ensure the APK isn't easily modified. I’ll deliver the playable APK, the complete Unity project with editor tooling for adding new missions/events, the backend module with withdrawal request endpoints, the wallet UI, and a technical doc covering mission additions, reward updates, and security maintenance.
$20 USD in 40 days
5.0
5.0

As an experienced backend developer and technology leader with a strong academic background, I possess a wide range of skills that align seamlessly with the demands of your Android adventure game project. My education in computer science and artificial intelligence, combined with decades-long professional experience in academia and software engineering has equipped me with a deep understanding of how to effectively employ cutting-edge technologies to create intuitive, engaging, and secure systems like the one you envision. Over the years, I've worked on multiple extensive software and AI projects similar to yours where I had to overcome complex technical challenges, ensure optimal performance across different devices, and maintain high data security standards. Specifically, I have developed backend modules that effectively track user activity and trigger payout logic - features crucial to your game's objective. Additionally, my experience with cloud deployment and scalable architecture will enable me to guarantee a game that runs smoothly on various mid-range Android devices, meets your promised load time expectation, and effectively preserves players' earnings even after unexpected app closures. Furthermore, my educational background isn't solely limited to technical expertise; it's also given me an edge in problem-solving—a trait essential when building clean-structured source codes that could accommodate new levels and events in the later stages.
$15 USD in 40 days
4.6
4.6

I understand you're building an Android action-adventure game where players earn real money, similar to how blockchain-based games offer in-game asset ownership and trading. My expertise in secure transaction systems and backend development for mobile games can ensure your earning mechanics are robust and trustworthy. My proposed technical approach involves a custom backend service built with Node.js and Express, deployed on AWS Lambda for scalability. Player wallets will be managed using a secure, encrypted database (e.g., PostgreSQL with encryption at rest). For cash-outs, I'll integrate with a reputable payment gateway like Stripe or a specialized crypto-to-fiat provider, ensuring compliance with relevant financial regulations. Mission completion data will be validated server-side to prevent exploits, and rewards will be disbursed via API calls to the chosen payment provider. To ensure the best outcome, can you share any initial thoughts on the specific regions you're targeting for launch, as this can influence payment provider selection and regulatory considerations? I'm confident in my ability to build a secure and engaging earning system for your game. Let's schedule a brief call to discuss this further.
$25 USD in 7 days
4.2
4.2

Hi, I am a Unity game developer with 8 years of rich experience in software development, with a background in Android games, backend systems, and in-app reward workflows. I am familiar with Unity 3D, C#, Android development, open-world game systems, mission logic, backend APIs, persistent player data, wallet flows, and game performance optimization. For your adventure game, I would use Unity and keep mission validation and reward crediting on the server side rather than trusting the client. I can build the open-world gameplay, persistent earnings, wallet/withdrawal flow, and a modular mission system so new challenges and rewards can be added later while keeping payout logic secure and easier to audit. I'm an individual freelancer and can work on any time zone you want. Please contact me with the best time for you to have a quick chat. Looking forward to discussing more details. Thanks. Emile.
$20 USD in 40 days
4.3
4.3

Hi, Google Play bans real-money gaming apps unless they use licensed gambling frameworks or strictly limited voucher systems. Your "cash out" requirement will get the app rejected immediately unless we pivot to a compliant reward redemption model. I structure earnings as non-transferable credits redeemable for specific digital goods to bypass financial regulations. Are you prepared to replace direct cash withdrawals with a curated voucher marketplace to ensure Play Store approval?
$15 USD in 40 days
4.0
4.0

Hi, I understand you’re looking to build an Android action-adventure game with an open-world exploration system and a secure mission-based rewards economy. For this scope, I would recommend Unity, as it provides a strong ecosystem for Android 3D development, open-world optimization, dynamic environments and scalable content. I can work on: • Open-world exploration and mission framework • Environmental puzzles and dynamic weather • Modular quest/objective system • In-game wallet and earnings UI • Backend tracking for mission completion and rewards • Secure server-side reward validation • Persistent earnings even after app closure • Withdrawal/voucher request workflow • Optimized performance for Android 8+ and mid-range devices • Clean architecture for adding future missions/events • Source code and technical documentation The reward system should be server-authoritative so earnings cannot simply be manipulated from the Android client. I’ll also structure the backend so payout rules and mission rewards can be updated independently. I can start by defining the game architecture, reward flow and MVP milestones before implementing the core gameplay loop. Best regards, Vinod
$20 USD in 40 days
3.6
3.6

As an experienced Full Stack Developer, I believe my skills and expertise make me the perfect candidate for your Android Adventure Game project. I have a solid grasp of both Android App Development and Backend Development, which will be invaluable in creating a fully playable Android build with clean code architecture and an efficient backend module for earnings tracking. Throughout my five years in the industry, I've worked on various projects of significant complexities and utilized different platforms. Unity is one such platform I'm well-versed with making it easy for me to deliver the game you're envisioning without neglecting compliance and security aspects. Moreover, my experience with React Native also gives me flexibility even if we want to consider Godot for development. What sets me apart is my commitment to long-term success. Not only can I ensure your game runs smoothly on different devices and stores player earnings accurately, but I can also equip you with the knowledge necessary to maintain the game's integrity, update rewards, and incorporate more missions via comprehensive documentation. With me onboard, you won't just receive a completed project; you receive lasting support and a reliable partner who genuinely cares about your success. Let's lock in those milestones and turn your unique concept into an adventure that players truly enjoy!
$20 USD in 40 days
3.9
3.9

Hello, I reviewed the Android game requirements, and the key challenge is building a secure reward system where mission completion, wallet balances, and payout records remain accurate even when the app is interrupted or the user goes offline. I would focus on a scalable game architecture, secure backend validation of mission rewards, persistent transaction records, wallet and withdrawal flows, and optimized open world performance for mid range Android devices. I have worked on Unity, Android applications, backend systems, secure transaction workflows, and game development projects and can share relevant examples once we connect in chat. Best Regards, Atik
$15 USD in 36 days
3.8
3.8

Hi, I’ve worked on mobile game concepts with progression systems, backend tracking, and reward-based mechanics, so I understand that the important part here is not only gameplay but also making the earning system secure and reliable. How do you plan to handle real-money rewards, through direct payouts, vouchers, or a third-party payment provider? I would suggest Unity for this type of Android adventure game because it provides a strong foundation for open-world environments, missions, effects, and future content expansion. I’d structure the backend separately to manage player progress, mission validation, wallet balances, and withdrawal requests while preventing reward abuse. The system would be designed so new quests and reward rules can be added without rebuilding the core game. Happy to discuss the MVP scope and technical approach. Abel
$15 USD in 40 days
2.9
2.9

⚠️ IF YOU'RE NOT HAPPY YOU DON’T PAY ⚠️ Hi, I understand you need a fully playable Android build for your action-adventure game where players can earn money by completing missions. I propose using Unity to create a seamless open-world map with a clean architecture, utilizing features like Unity's terrain system and C# scripting. I have relevant experience with Unity development and can provide a lightweight back-end module to track mission completion and trigger payouts. I’d love to chat about your project! The worst that can happen is you walk away with a free consultation. Regards, Chris
$20 USD in 7 days
4.2
4.2

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