Right...I see that you tried to Re-do the Classic Hecu Marine on Black Mesa,You tried to Copy his "Cloth" Style and tried to make the most Close possible to the Classic Marine,But you did a bit of Mess after All,As I see on the Texture Sheet you Just Putted Solid Colors,Gray,Black,and White,And on those Textures Sheet you didn't even Edited Them as I see,You could just put the Edited Textures on the Download,Not the ones that you Edited,That did the Download be More "Heavy" for the Submission,Making the most of the Textures,Useless.
I saw that you didn't messed with the Normal Map,But It just Look's like that you removed all the Detail of the Soldier of Black Mesa,It look's really Flat Now,Unless some parts of the Diffuse of the Texture Sheet "Body.vtf",You didn't mess with the .VMT Too,But the Phong as I see is Disabled,on the Screenshots,and the Bumpmap too (Normal Map) making the Skin more "Low-Efforted skin".
And no,that's not a Recolor,It's everything,Unless a Recolor,You just putted Solid Colors on it and removed the Cloth Folds of the Default Texture,and on a resumed-way the Skin look's like a Flat poorly made texture. If you wanted to make you Skin more realistic you could put 2048 Image Resolution on the Texture Sheet to everyone see the "Details" But to be honest there is no Details as I see here on the screenshots. You should fix you Credits too,Put the Original Author "Valve" Skin Creator "You" and some Extra Things.