.MODPAK File

File extension modpak is associated with the Starbound, a 2D adventure and role playing computer game for Windows, Mac OS X, Linux and video gaming consoles.

A .modpak file stores modification for the game.

How to open:

When placed in proper folder, these modpack files will be applied to the game to modifiy it.

How to convert:

Mod files can be usually edited and changed with dedicated modding tools.