User blog comment:Boxtropica/The PTC filetype is rather cryptic, isn't it?/@comment-14600979-20140610031444

I can open .PTC files reasonably well in a plain text editor (Apple's TextEdit), with a small string of symbols at the start. One program I have here starts with

"PX01l�������LAWBETA�dGy«wKíÍ·òÆ©˝µ0ÈPETC0300RPRG��������S" before the first line of commands, which is in the same line with no spacing.