Security Testing

Blankos Block Party

Client:Mythical Games (published by Third Kind Games)

Cyrex partnered with Mythical Games to conduct grey box penetration testing for Blankos Block Party, securing gameplay systems, backend services, matchmaking, and in-game transactions across its multiplayer ecosystem.

The Challenge

Securing a Player-Driven Open-World Multiplayer Platform

Blankos Block Party is a vibrant, open-world multiplayer game centered around player creation, social interaction, and curated digital collections. With gameplay spanning exploration, mini-games, world-building tools, and in-game transactions, the title relies on both secure backend services and validated gameplay systems.

For Mythical Games, security validation needed to cover:

Matchmaking infrastructure
World creation tools
Player interaction systems
Physics-based movement and actions
Party and clan functionality
In-game transactions
Mini-games and quest systems

In a multiplayer environment with user-generated content and economic components, vulnerabilities can impact fairness, progression, and platform integrity. Mythical required structured penetration testing to assess exploit risks across gameplay and backend layers.

The Cyrex Solution

Grey Box Penetration Testing Across Gameplay & Backend Services

Cyrex conducted comprehensive grey box penetration testing, combining architectural insight with real-world attack simulation.

The objective was to validate server-side controls and identify weaknesses across both live services and gameplay systems.

Gameplay & Interaction Validation

Our testing included evaluation of:

Physics systems (movement and interaction mechanics)
Player-to-player interactions
Party and clan systems
Mini-games and quest progression

We assessed whether gameplay actions were properly validated server-side and resistant to manipulation.

Backend & Transaction Security

Cyrex also evaluated:

Matchmaking services
World creation tools
In-game transaction flows

The goal was to ensure that economic and social systems were secured against tampering, improper access, or logic flaws.

Vulnerability Identification & Regression Testing

During testing, Cyrex identified vulnerabilities across multiple services, several of which were considered high severity by the development team.

Following remediation:

Vulnerabilities were patched with priority
A full suite of sanity and regression tests was executed
Systems were validated to confirm secure implementation

This ensured that fixes were effective and no additional issues were introduced.

The Outcome

Reinforced Multiplayer & Platform Security

Identification and remediation of critical vulnerabilities
Improved server-side validation across gameplay systems
Strengthened security of in-game transaction flows
Increased confidence in multiplayer integrity

Client Feedback

Mythical

“It was a pleasure working with the security team. They are extremely knowledgeable, capable, and very flexible; partnering with us and adjusting processes and communication to suit our needs. We are very much looking forward to an ongoing relationship between our teams.”

Mythical

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