fix “assertion failed!” error in cs 1.6

June 3, 2025 By romas Off

Last updated: June 3, 2025

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Screenshot showing a Microsoft Visual C++ Runtime Library "Assertion failed!" error for CS 1.6 on Steam, with the message "Expression: !m_bMounted" and game in background.

Fix “Assertion Failed!” in CS 1.6 from Visual C++ Runtime Library. Guide covers file verification, Visual C++ (x86/x64) installation, and resolution fixes. Get your game running!