Last Zombie[Last Zombie 1.0.0 Installer]
[Last Zombie 1.0.0 Installer] on Moddb
Water[Water 1.0.3 Installer]
[Water 1.0.3 Zip File]
[Water 1.0.3 Installer on Moddb]
[Patch 1.0.0 to 1.0.3]
[Russian] by Beez-one (for 1.0.3)
[Water OST Zip File]
[Water OST Zip File on Moddb]
Human Error Co-op[Human Error Co-op - Beta 1.0.5 Installer]
[Human Error Co-op - Beta 1.0.6 Patch]
Human Error - Episode One[Human Error 1.0.2 Zip] + [Patch 1.0.3 Zip]
[Human Error 1.0.2 Installer] + [Patch 1.0.3 Zip]
[HE 1.0.2 Zip on Moddb] + [Patch 1.0.3 Zip]
To install .zip files. Extract the files and copy the Human_Error / water folder to your SourceMods folder, which is something like: C:\Steam\steamapps\SourceMods depending on your Steam installation. For versions lower than 1.0.2 of HE remember to download the patch and extract the content to the Human_Error folder.
For localizatino files, read the instructions here.
NEW: Since the latest Steam update, HE crashes on start up. You need to download the Patch 1.0.3 Zip in order to fix this. Copy the files to the Human_Error under SourceMods and remember to restart Steam before you try to play it. The update also has some changes to some of the maps, and includes the .vmf files to all the maps.