Grey’s life has been nothing but a struggle. A constant downward spiral, and it seems even reality has turned against him. Grey awakens to find that the world has gone quiet, the streets empty. You must find help. Explore the grim world Grey lives in a completely new and unique world, and find clues to his shattered past. Grey is a total conversion Half-Life 2 horror modification where the player must solve puzzles, fight to survive, and find out what is happening to the world around you. We have made a lot changes to the base Source engine and have added countless new mechanics in the mod such as the objective indicator, portable medkit, donator based extras, pickup animations, failed reloads, new picture based GUI elements and much, much more!

ghostings says

This review may contain spoilers

7/10 - Agree Disagree

(-)Negatives:

Enemies: I get the impression that enemies are strong in damage and in health to promote the option of running away from them. Except for one problem, you cant. Corridors are tight and enemies follow you at high speeds for every mile of the way. So we are forced to contend with restarting the level or saving after every baddie dead. NO GO.

Normal ending: Disgustingly brief and unresolved. I know its supposed to encourage playing the hard mode for the better ending, but to be honest it really pushed me to uninstall the game, and I did. I only reinstalled it to show it off to my friends.

(+)Positives:

Alternate modes: Though most people wouldn't bother touching the hard mode after the disappointment of the normal ending, I decided to power through it anyways. The changes make the scares fresh and the ending for hard mode worth it.

Atmosphere: The music and environment really pull together a hostile and terrifying environment. I get a lot of AoM:DC vibes sometimes to with breaking every box for ammo, having flashlight batteries, dog and slasher enemies. Nostalgic.

That randomly spawning enemy: Static enemy positions really take the teeth out of a horror game, so this mod decides to randomly spawn an enemy behind you. Really keeps you on your toes.

Overall:
IF you're patient and forgiving, this mod is actually pretty impactful, but that can be said for any other mod. What sets this mod apart though is the effort that goes into the environment and the atmosphere. I even wondered for a second if I should continue playing such a violent game.