i.e. Don't bother unless you are rich or otherwise have a good lawyer.
Try to join an established development team instead - but a vicious circle here.
Ultimately, this trend in the games industry is keeping it stagnant. The companies doing it can only blame themselves. Problem is, they really don't care. I personally find that very hard to comprehend. But some people are just scum.
And people wonder why the general level of games is rather crappy on originality nowadays...