Protocol 4: Code Breaker PvP

Hacker Logic & Cipher Puzzle

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Unleash your inner hacker. Break the code, top the global ranks, and dominate in real-time PvP duels! Step into the world of elite hackers with Protocol 4! Your mission is to crack secret codes using pure logic, deduction, and specialized hacking tools. Play the high-stakes Daily Challenge, climb the Global Leaderboards, or challenge your friends in real-time PvP Duels! Features: REAL-TIME PvP DUELS: Challenge friends or random operatives worldwide. Set your defense code, stake your credits, and see who breaks the code first! GLOBAL LEADERBOARD: Earn XP and climb the ranks to become the ultimate Server King. MULTIPLE GAME MODES: Play Quick Hacks for fast action, Training to hone your skills, or the Daily Challenge for massive rewards. ARSENAL OF TOOLS: Use advanced tools like Logic Analyzers, Time Warps, and Oracle Hints to gain the upper hand. PROGRESSION SYSTEM: Start as a Rookie and level up to unlock elite titles and badges. Are you ready to initiate Protocol 4?

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Protocol 4 has been fully re-engineered! NEW TITLE: Guess4 is now Protocol 4! Welcome to the new era. REAL-TIME PvP DUELS: Challenge your friends to high-stakes 1v1 hacker battles. GLOBAL LEADERBOARD: Climb the ranks and become the ultimate Server King. GAME ACHIEVEMENTS: Unlock exclusive badges and titles as you progress. APP OPTIMIZATION: Massive performance improvements and bug fixes. NEW LOCALIZATIONS: Full support for Spanish, French, German, and Portuguese (Brazil).

Version 2.0

The developer, HAKAN OZGER, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Purchases
    • User Content
    • Identifiers
    • Usage Data
    • Diagnostics

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Purchases
    • User Content
    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • HAKAN OZGER
Size
  • 19.3 MB
Category
  • Puzzle
Compatibility
Requires iOS 18.6 or later.
  • iPhone
    Requires iOS 18.6 or later.
  • iPad
    Requires iPadOS 18.6 or later.
  • Mac
    Requires macOS 15.6 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 2.6 or later.
Languages
English and 5 more
  • English, French, German, Portuguese, Spanish, Turkish
Age Rating
4+
In-App Purchases
Yes
  • Agent License $0.00
  • Master Kit $9.99
  • Pro Kit $4.99
  • Trust Fund $9.99
  • Starter Kit $1.99
  • Hacker's Stash $4.99
  • Pocket Change $0.99
  • Learn More
Copyright
  • © 2025 Hakan Özger
  • Developer Website
  • Privacy Policy

    • Supports

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      Discover new games and play with friends. This game also features leaderboards and achievements.

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