The new Windows installer offers multiple options, including extracting as a portable app.
Step 1: Download the latest warzone2100_win_installer.exe:
https://github.com/Warzone2100/warzone2 ... taller.exe
Step 2: Launch it and choose “install for me only”
Step 3: Click the “Advanced” button in the bottom-left, and choose “Portable Install”, then press OK.
Step 4: Continue through installation, pick the folder (or USB drive) you want to install it to, and it will install a portable build.