There are no cheats that work. But one Super easy money:
Ok what you do is get 2 separate sites that are both playing RobotRage up on your screen, but first you need 2 different e-mail addresses and 2 passwords to log in with on both windows. You log in on both windows (with the separate emails and passwords) and then with both, go to the lobby (or put weapon on one of them first) and put them in the same country. Then use one of them to challenge the other guy, then with the other guy accept the challenge. You will be version yourself!
Then use one of them to kill the other!
And then you win money and you can keep doing it over and over.