Case Study: How We Helped a Mobile Game Launch Smoothly with Zero-Crash Rating

🎯 Project Overview

Client: Independent Mobile Game Studio
Game: Mystic Quest (Adventure Puzzle Game)
Target Platforms: Android and iOS
Goal: Launch the game globally with minimal bugs, smooth performance, and high player retention.

Mystic Quest combined colorful worlds, complex puzzles, and real-time player decision trees. The studio wanted to ensure that the user experience was flawless — especially because early reviews would directly impact App Store and Play Store visibility.

Mobile game testing services

That’s where Testers HUB came in.

🚧 The Challenges

Testing an adventure puzzle game isn’t like testing a simple casual app. We faced several unique challenges:

  • Non-linear gameplay: Players could solve puzzles in different sequences, leading to multiple possible progressions. 
  • Memory management: Some levels were graphics-heavy, raising concerns about crashes on older devices. 
  • Save/load reliability: Players could pause mid-puzzle; if saving failed, progress would be lost. 

Cross-device performance: The studio needed the game to work from mid-range Android phones to the latest iPhones.

 

🛠️ Our QA Approach

At Testers HUB, we created a multi-layered mobile game testing strategy:

1. Device Matrix Testing

We selected a real-device matrix:

  • Android (low, mid, and flagship models) 
  • iOS (iPhone 11 to iPhone 15) 
  • Tablets (iPad Air, Samsung Galaxy Tab) 

2. Functional Testing

We validated:

  • Puzzle logic and progression 
  • Save/load system 
  • In-app purchases for bonus levels 
  • Leaderboard functionality 

3. Exploratory Gameplay Testing

Instead of just following a script, we played like real users:

  • Skipping puzzles 
  • Abandoning levels halfway 
  • Making wrong choices repeatedly 
  • Trying network interruptions mid-save 

This approach helped us find real-world bugs that automated scripts would have missed.

4. Performance Testing

We monitored:

  • Frame rate (minimum 30fps across devices) 
  • Battery usage 
  • Heat generation during long sessions 
  • Load times between levels 

Tools used: Android Profiler, Xcode Instruments

5. Crash and Stability Testing

  • Stress testing by running long gameplay sessions (2+ hours) 
  • Background/foreground testing (switching apps mid-game) 
  • Handling incoming calls, notifications

 

🔎 Key Findings

Here’s what we discovered:

Issue Impact Status
Memory leak after Level 10 (older Android devices) Crashes after prolonged play Fixed
Save function failed after forced app minimization Lost user progress Fixed
Incorrect leaderboard update on poor networks Wrong player rank displayed Fixed
UI overlapping on iPhone SE (small screens) Blocked “Next Level” button Fixed

 

Each issue was logged with:

  • Clear steps to reproduce

  • Video and screenshot attachments

  • Severity categorization (Critical, High, Medium, Low)

📈 The Results

After two complete QA cycles and retesting:

✅ 100% of critical and high-severity bugs were resolved
✅ Game crash rate dropped to below 0.2% in beta testing
✅ Save/load feature achieved 99.9% reliability across devices
✅ Play Store rating on launch: 4.7/5 (based on first 1000+ users)
✅ Player session time increased by 18% compared to pre-QA beta testing

The client successfully launched Mystic Quest globally, with smooth onboarding, minimal user complaints, and strong early retention rates.

 

💬 Client Feedback

“We thought our game was ready — but Testers HUB found issues we didn’t even imagine. Their real-player mindset and detailed reports helped us polish Mystic Quest into a product we’re proud of. Highly recommend them to any game studio serious about quality.”
— Creative Director, Mystic Games Studio

 

🚀 Final Thoughts

Game launches are critical moments. One crash, one frustrating bug, one broken leaderboard can destroy months of development effort.

At Testers HUB, we combine technical QA with a deep understanding of how players behave — not just how developers hope they behave. That’s why studios trust us to deliver mobile games that are polished, playable, and primed for success.

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