As previously discussed here, Humble Monthly is switching to a new model with no "mystery games" where you'll be able to choose which ones you want to keep from a set selection.
It looks like the games were inadvertently revealed already (image link), so the first month's options will probably be:
- Shadow of the Tomb Raider
- Void Bastards
- Phantom Doctrine
- Dead In Vinland
- Horizon Chase Turbo
- Dark Future: Blood Red States
- Desert Child
- Aegis Defenders
- X-Morph: Defense
If that's an interesting set of games to you, you'll probably want to subscribe to Humble Monthly now to be grandfathered in on the "Classic" plan, which will let you keep all 10 games every month for $12/month (and you should be able to "pause" if you don't like a particular month). Otherwise, the plan options that will be available after Dec 6 are more expensive for fewer choices.