Game prolly the only "mainstream" rapper ever who's actual specialty is diss/battling other rappers.
Other rap artists excel at it, but they're got other shyt they specialize in (Push/Coke Rap, Lupe/Extended Metaphors and Similie, etc)
But if Game gonna drop diss tracks, Game gonna drop DISS tracks that'll do anything from change public perception to knocking you off your pivot to knocking your head clean off.
edit: (note I only used Push and Lu because they're the best recent examples, not because they're extremely tested in ongoing back and forths with other battle tested MCs
edited edit: and no I'm not talking about subliminal diss wars over the years