I thought it was a little strange that only Battletech was revealed as the single early unlock game for October's Humble Monthly bundle. But now, Sonic Mania has also been announced as a second title in the forthcoming bundle.
You'll get access to both games immediately if you sign up to Humble Monthly for 10/$12. The remaining games in the October bundle will then be confirmed and made available next Friday.
Sonic Mania is an exciting new addition to the bundle, as it's been very positively received since release back in 2017. After years of misfires, it feels like a classic 2D platformer that truly celebrates and builds upon the roots of the series. It'll usually set you back around 15, too, so you're getting a small saving - plus a whole bunch of extra games - if you get it through the October Humble Monthly bundle.