boss 40 - call of house hardabar - er arkniss (king lich - final boss)

Call of House Hardabar (Grimrock 2 MOD). Difficulty: Hard.
Download: www.nexusmods.com/legendofgrimrock2/mods/167
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It is essential to install the 4GB Patch to prevent the game from crashing (this happens in large mods for technical optimisation reasons):
www.ntcore.com/4gb-patch/
Download the program, run it, then it will ask for a path, then choose the path where the grimrock 2 executable is: "grimrock2.exe".

[@slavyanchea]

74 hours! OMG

[@DonEmilioSpain]

Yes, and knowing the puzzles and fights by heart, my first gamplay in which I passed (normal difficulty) the game was about 120 hours with 80% of the secrets discovered. It is very long.