.exe
The end of a filename, used for executable files. The game sonic.exe however, caused a new generation of idiots who add exe to stuff to make it scary. BUT NO, IT'S A WINDOWS EXECUTABLE. *loud, dissapointed, exaggerated sigh*
"This is my scary game, it's called ghosthouse.exe!"
"How is it being a .exe file relevant to it being scary?"
"You know, like sonic.exe!"
"Or like LITERALLY ANY PC GAME."