The error message "gamemd.exe - patched to version 1.001" typically appears when the game client detects a modified or outdated version of the gamemd.exe file. This error can occur due to various reasons, including:
Running the original, unpatched gamemd.exe on a modern multi-core processor often results in the infamous "black screen" or a crash to the desktop (CTD) within seconds. The "patched to version 1.001" version usually includes fixes for the CPU timing loops. gamemd.exe -patched to version 1.001-