The hmm6_2.1_efigs.zip file you have requested: Official Patches / v21 / Heroes of Might & Magic 6 v1.8 to v2.1 Patch (EFGIS, CD/DVD) - 2.13gb is not available. Perhaps try browsing all files for the game Might & Magic: Heroes VI and upload any files you want to share or are missing. This is the only information we could locate:
This patch will update Heroes of Might & Magic 6 from version 1.8 to version 2.1. It will only update the English, French, German, Italian and Spanish CD/DVD versions. It addresses bug issues in both the single-player and multiplayer modes.