Cthulhu is a single-player modification for Half-Life. It contains 65 maps, 21 new monsters and 14 new weapons. Aeons ago, Earth was ruled by The Great Old Ones, beings so alien and terrible that merely seeing them would drive most people mad. Before man's ancestors climbed down from the trees, these being were defeated in a war with The Elder Gods. But their alien nature meant that they could not be slain in any way that we would understand, so they were imprisoned. And so they wait, patient and potent until the stars are right and they shall walk forth once again and wipe mankind from the face of the Earth. You play Ranulf Stafford, an occult investigator in Arkham in the year 1928. Drawn into a nightmare chain of events, you find yourself the only thing standing between mankind and the return of Cthulhu, one of the most dreadful of The Great Old Ones.
I think i played the mod back around 2010-ish, sort of about a year before i decided to make stuff up to make it look better.
The mod overall is okay, i liked the fact that it tried to grab some of the Lovecraft's cosmic horror over despite the many problems that sort-of buggers around the mod.
It is unfortunate that the level design is overall pretty terrible even by HL's nineties standards, the models are mixed up, the coding screwed (had to even remove the shotgun's muzzleflash because of that), and many of the gameplay decisions is just baffling to me.
But hey! I can see a lot of love and imagination put to this mod, even if the lack of skills really stand out during gameplay, so that's that.