Do I start a separate channel?

So I have a gaming channel that recently started to gain some traction. My first year on it only net me about 40 subscribers. However, in the past 3-4 months, I have gained over 300. The game I focus on is Rainbow Six Siege, however, I want to play other games on the channel as well (Call of Duty, Starfield, etc). I post a video that isn’t Rainbow Six Siege maybe 1 out of every 20 that I upload. They don’t necessarily do poorly, but they obviously aren’t directed towards my primary audience of Siege players. I’m super hesitant to start a new channel and try to split up my YouTube gaming channel efforts. Should I start a new channel or just take the risk on my current channel and hope for the best? Any feedback is appreciated. Thanks!