Humble Monthly has at least some kind of attempt at a lead game. This doesn’t.
Osiris is the closest thing to a lead game (lowest sale price is $12.49 and its never been bundled). It is also a two year old Early Access title that is rated “Mixed” in both its recent and overall Steam review scores. While the game’s posted timeline promises Campaign (but really only promises a playable slice, not full campaign) and Survival modes will be added in December and the game will see full release in Spring 2019, recent reviews complain that it has been seven months since the last update.
I know Kentucky Route Zero is a critical darling in some areas, but it was in a Humble Monthly two years ago. And a regular Humble bundle one year ago.
War for the Overworld was in a Humble monthly last year, while the Heart of Gold DLC gets steeply discounted.
Phantom Brave is a two year old PC port of a 14 year old PS2 game. Tricky Towers was in two different $1 bundles.
RWBY: Grimm Eclipse is a disappointing action game. I’d really like to complain more about it, but nearly everything just comes done to it being mediocre. It was originally billed as a game that took inspiration from Dynasty Warriors, but offered four player online co-op. The actual product was just… disappointing and mediocre. Not even close to DW-style enemy counts or action, it was just another uninspired action game with shallow combat and dull areas. I think it primarily continues to receive support and new DLC because the publisher knows it can still make some money from RWBY series fans.
Okay, that was a harsh judgment on RWBY:GE… I mean, it did start life as a Unity game created by a single fan, before Rooster Teeth hired him to make a full scale product.
And it isn’t like these titles are particularly bad. This just isn’t anywhere near Humble Monthly status in its composition.