if its now showing the newer npcs try this. 1 go to gmod properties then go to the game files
2 head to the garrysmod folder then go to addons 3 find the file named
"[vj] Dead Space : Necromorphs Npc" then copy it 4 head back to the first garrysmod folder then go to bin 5 click on bin and find "gmad" and paste the addon onto it 6 head back to the addons folder and there should be a file folder 7 then if you did all this open gmod and it should work.
PS. if you have missing textures do the same thing in this guide but with the materials pack for this. i hope this help some of you guys