If you suspect someone of cheating, hacking or tampering with the game, the best thing to do is to report it directly to an admin or mod on Challengermode. Contact us via the Support menu or via the contact admin button.
Please do not accuse someone of cheating before you and we are certain that the person has in fact cheated. One of the worst things that can happen is to get accused of doing something you haven’t done. This leads to unnecessary confrontations and maybe anger towards other players where it’s not necessary.