Overview
This guide is for people getting the runtime error when attempting to launch the game. Compatible with Windows 7, 8 and 10. (This might not work for everyone. Post below if it works for you.)
Easy Fix
~ Find the game’s folder on your computer. Default location: C:Program Files (x86)SteamsteamappscommonCaesar 4C4
~ Find and run RegisterDLL.bat as an administrator.
~ Now try launching the game to confirm that it works.
Tested on Windows 7 64-bit, Windows 8.1 64-bit & Windows 10
Note: if the game still doesn’t run then try setting its compatibility mode to Windows XP SP2
This guy’s video helped me: