While there is no official portable executable, some users create a "portable-like" setup by installing the software on a PC and then moving the installation folder to a USB drive.
: This engine was used to create global hits like Five Nights at Freddy's . Clickteam Fusion 2.5
: Existing customers can use the Fusion 2.5 Installer Download page to retrieve their software using their serial number. Understanding "Portable" Methods