Riskware, in general, is a detection for items that are not strictly malicious, but pose some sort of risk for the user in another way.
RiskWare.GameHack is used for files that give users unauthorized access to a gaming platform or server, or an unfair advantage in a game. This could be a violation of the terms of service (ToS) of the platform with the consequences that come with such a violation.
Common infection method
Files of this nature are often offered as keygens, cracks, and others on sites of a shady nature.
Malwarebytes can remove RiskWare.GameHack without further user interaction. Should users wish to keep it, they can add the detections to the exclusions list. Here’s how to do it.