Physical copies of the War Chest or standalone discs utilize an archaic copy protection system called SafeDisc (which relies on secdrv.sys ). Microsoft permanently deactivated this driver in Windows 10 due to severe security vulnerabilities, rendering original discs unplayable out of the box.
You must update the game executable ( MOHAA.exe ) to a version that does not rely on the disc check. medal of honor allied assault windows 10 fix upd
MOHAA was designed for Windows XP and utilizes rendering technologies that are no longer supported natively. Modern display settings (high DPI), 64-bit architecture, and lack of GameSpy (the original multiplayer server browser) all contribute to failures. Essential Pre-Fix Steps Physical copies of the War Chest or standalone
: Newer drivers from NVIDIA, AMD, and Intel do not translate legacy OpenGL 1.1/1.2 calls correctly. This causes immediate crash-to-desktop (CTD) loops on startup. MOHAA was designed for Windows XP and utilizes
It sounds like you stumbled across a guide or a forum thread about getting this classic game to run on modern hardware. It is definitely an "interesting" topic because Medal of Honor: Allied Assault (MOHAA) is notorious for breaking on Windows 10 and 11 due to how old its engine (id Tech 3) is.
Copy opengl32.dll from the MOHAA Revival pack into your main game folder. This bypasses Windows 10’s broken OpenGL fallback.
Windows 10 blocks the secdrv.sys driver used by the original discs for copy protection. To fix this, you must use a "No-CD" executable or a community launcher like the MOH: Community Launcher , which replaces the broken GameSpy master server.