The Squad Hammer Core book has just been updated to the ORC edition. 

This is both a regular update, adding in and clarifying a bunch of material in the rulebook (putting it just past 50 pages compared to the original 30ish) but it also puts the rules under the ORC license (originally created by Paizo).

This allows you to create your own derivative works using any material in the Squad Hammer rulebook. Derivative works must themselves use the ORC license though any product identity you create is not required to. Please follow the links in the rulebook for details. 

Squad Hammer has always been a game "for the people" and now that is as literal as it can be. 

If you are an existing player, all you have to do is download the new rulebook. It couldn't be easier.