There is only one file type that uses the .LOVE extension:
LÖVE Game File
Game package created by LÖVE, a free framework used for developing 2D games with the Lua programming language; contains the assets for the game and is run by the Love engine when opened; saved in a compressed .ZIP format and contains the main.lua script and other assets (e.g., scripts, graphics, sounds, fonts, etc.).
To create a LOVE file, first create the main.lua file and other game resources, then compress them into a .ZIP file and rename the file extension from ".zip" to ".love." Make sure the main.lua file is in the top-most directory level of the Zip archive.
Updated: December 22, 2011