A Quick Warning

Do not install mods over a game installation that contains save files you care about. Installing a mod over an installation with existing saves that are not compatible with that mod can corrupt your saves!

Civilization: Call to Power (Call to Power 1)

The process for installing mods in Call to Power 1 varies greatly from mod to mod. That said, usually it involves either running some form of executable installer (such as with the Unofficial CTP v1.21 Patch Hack) or replacing the game folders (as done with Forever Future).

Executable Installers

When running the executable installers, it is sometimes a good idea to run the mods in Compatibility Mode (usually for Windows XP SP3) to ensure that it installs correctly on modern systems.

Manual Installations

For mods that just come with the ctp_program and ctp_data folders inside the ZIP file, you can simply copy-paste the contents over the contents of your game's installation. When pasting, you should get a message that asks if you would like to replace all of the contents in the folders - click yes.

Call to Power 2

The process for installing mods in Call to Power 2 is much more nuanced than Call to Power 1, as some mods require Modswap. Modswap was created to ensure that you do not have to swap back-and-forth between your vanilla (unmodded) installations and the modded ones, you can simply trigger Modswap and it will change the files for you. Some mods are scenario mods, meaning they must be added to your scenarios list and manually selected in-game from that list to work (for example, the Frenzy AI mod).

Manual Installations

For mods that come with the ctp_program and ctp_data folders inside the ZIP file (and that DO NOT require Modswap), you can simply copy-paste the contents over the contents of your game's installation. When pasting, you should get a message that asks if you would like to replace all of the contents in the folders - click yes.

Installing with Modswap

For mods that come with the ctp_program and ctp_data folders inside the ZIP file (and that DO require Modswap), you need to use either Modswap (or, for some mods, the Call to Power Mod Manager) to install the game. Note that the CTP Mod Manager only supports some mods, so please check the release page to ensure it can install the mod you are trying to install. Once you have installed Modswap, it should be a matter of simply loading the Modswap menu and selecting what you would like to play. If you are using the Call to Power Mod Manager, it should be a matter of adding your installation directory, then adding your mod's ZIP file and applying that mod to the installation using the Apply button.

Scenario Mods

For scenario mods, you can simply paste the folder that includes the folder scen0000 in it into your Scenarios folder (which is in your CTP2 installation and includes AlexanderTheGreat, MagnificentSamurai, etc already). Once you have done that, you can simply run the game and select the scenario from the scenarios list.