I've just downloaded the SSH:MM WTF Mod (Scientist Slaughterhouse:Mod Messup WTF mod from moddb.com. The sounds and the speech are funny. The new models of the monster are intresting. The models of the crossbow and the others are from Half Life 2. (Maybe it is possible to create Half Life 2 on Half Life 1)
This is a mod which takes other HL1 mods and compresses them into a big fat ball. SSH:MM#1 is based on SSH and an old HL1 mod called WTF made by The Afro-Man (which no longer exists).
WARNING: If really disturbing content about uhhh... REALLY NASTY GROSS stuff that sensitive people can't handle and you are sensitive to REALLY NASTY GROSS stuff I don't reccomend you to play this mod, all the REALLY NASTY GROSS stuff are just f*king lol.