-Spirit Of Half-Life (http://www.moddb.com/mods/spirit-of-half-life)
-Gravity Gun Map for Spirit of Half-Life (http://gamebanana.com/maps/65864)
-Snowball Mod for Half-Life by Teemu Polvi
-Creepy trees for GoldSrc by NaitsirK di Fire (https://gamebanana.com/prefabs/7233)