Installation

Manual Installation

This installation guide will cover how to install Hammer Addons.

Note

A fork of Hammer Addons comes pre-installed with all games based on Strata Source. Installation instructions for these games will not be provided.

Download HammerAddons

Download the latest release from the releases tab. Extract the contents to somewhere convenient, for example to a HammerAddons folder inside your steam library directory. It doesn't matter where, just note down the file path. This way multiple games can reuse the same install.

Install postcompiler

Step 1

In hammer, open the expert compiler menu and add a new step to the compile configuration.

Tip

To open the expert compiler menu, you'll need to load a map first. Once you've loaded a map, open the expert compiler menu by pressing File > Run Map or F9 then pressing Expert.... If you don't see this appear, you're likely already in the exxpert compiler menu.

Step 2

Move the new step underneath the vbsp step.

Tip

Postcompiler means it runs after (post) the bsp step.

Step 3

Select the empty step and set the command to Executable.

Step 4

Navigate to postcompiler.exe inside the extracted folder.

Step 5

Set the command parameters to --propcombine $path/$file. Make sure the step is ticked on. That's it!

Tip

If you want to copy the postcompiler exe elsewhere, note that it requires the binaries and transforms folders to be present alongside it to function.

Install custom fgd

To install the custom FGDs for a game, copy and paste the relevant .fgd file from the extracted folder into the game's bin folder. Provided is a list of each supported game and the .fgd which the game uses:

Game Name	.fgd Name
Alien Swarm	asw.fgd
Black Mesa	blackmesa.fgd
Counter Strike: Global Offensive	csgo.fgd
Half-Life 2: Episode 2	ep2.fgd
Half-Life 2: Episode 1	episodic.fgd
Garry's Mod	gmod.fgd
Half-Life 2	hl2.fgd
INFRA	infra.fgd
Left 4 Dead	left4dead.fgd
Left 4 Dead 2	left4dead2.fgd
Portal	portal.fgd
Portal 2	portal2.fgd
Team Fortress	tf.fgd

That's all there is to it!

Important

The custom FGDs load custom models in hammer for preview of certain entities (Like prop_portal). To install, see Install hammer models.

Install hammer models

Step 1

Take note of the path to the hammer folder inside the extracted Hammer Addons folder. The easiest way is to navigate inside the folder, then click on empty space in the address bar to allow copying it to the clipboard.

Step 2

Open the gameinfo.txt file for the game you're trying to install Hammer Addons into and add Game "path/to/hammer/folder" as the last line in the SearchPaths.

Here is an example with Portal 2:

"GameInfo"
{
	game 		"PORTAL 2"
	title 		"PORTAL 2"
	GameData	"portal2.fgd"
	gamelogo 	1

	SupportsDX8     0
	SupportsXbox360 1

	FileSystem
	{
		SteamAppId				620	
		ToolsAppId				211

		SearchPaths
		{
			Game |gameinfo_path|.
			Game portal2_dlc2
			Game portal2_dlc1
			Game platform
			Game "C:/Program Files/Steam/SteamLibrary/hammer_addons_v2.5.3_win64/hammer"  # <----
		}
	}
}

Important

Garry's Mod doesn't use gameinfo.txt anymore, so this won't work. Instead, cfg/mount.cfg should be used.

That should be it!