> Developer B thinks A's game is a bit too similar and decides to sue. Unless you are one of A or B I don't see why you care. As well, I doubt you can preclud

> Developer B thinks A's game is a bit too similar and decides to sue. Unless you are one of A or B I don't see why you care. As well, I doubt you can preclude this possibility via a code license. > Another option is GPL, but I don't want to stop commercial usage The GPL (despite what commercial entities incorrectly proclaim) does not stop commercial usage. It simply stops (if enforced) those commercial entities from hiding their additions from the world resulting in creation of a proprietary variant.