LÖVE

When I download some exmple,their type always is ".love",and seem their really type is".pk" ?
So I can not decompression them (I just know .7z .rar .ZIP .ios)

How to open some file which type is .pk ?
I want to see the code.

A .love is a .zip, only renamed. You can see the code by first renaming it to .zip and then unpacking.