I've always wondered what would happen if two friends built a game together and then the employer of one of them tried to claim ownership: "sorry, I actually on

I've always wondered what would happen if two friends built a game together and then the employer of one of them tried to claim ownership: "sorry, I actually only own half the game". Hand over the bits of code you wrote in a completely broken state (since it is, after all, literally only half the code), quit, then help your friend fill in the pieces again.