I recently followed the answer on this site "Uninstalled Programs History...".
That opened several hours of experimentation with Event Viewer.
My question; Why are there many installed programs (Many are games) that do not appear in Event Viewer?
It's because the answer you saw is regarding showing you events logged by the MSIInstaller service.
This is the 'usual' Windows installer system, but it's not the only way to install programs.
Some/many programs use their own installer, or none at all.
Those ones may or may not write events, depending on if the author programmed it to or not.