I'd say the first 3 for sure.
2nd pic, absolutely. That mass of the dude and the placement of the dick makes no sense. In fact, if you look at it closely, it looks like the dick was photoshopped over everything else. Different line work, shading, the color is slightly off, and it's missing the more 'textured' feel of the rest of the work; which overall shares that very airbrushed work that AI is becoming known for.
1 and 3 are going for a more traditional cell-shaded look, but check out the details. Hands, when visible, are a mess. Small details on clothing are nonsensical (check out the 'bracelets' on both wrists in 3). Judging from the bad linework along the chin and neck of the dullahan, that was probably just bad photoshopping again on the part of the dev.
As for the rest? It's consistent, and much simpler. Like, you could trace other's people's art in GIMP and get something similar on the quick. The linework is really basic and lacks intricacy. The shading is also very simple, and has trouble getting up to and staying within the line work (e.g. didn't spend time to make dedicated selection areas and layers as they worked). Ascetically, it doesn't match the prior pieces, but it doesn't immediately scream 'AI' with the ways it is sub-par.
As for the card table background? Given some of the soft meandering edges where you'd expect to see hard edges, it might be AI. Or maybe they took screencaps of Hand of Fate and ran it through a few photoshop filters. I dunno, but again, the characters stick out from it like sore thumbs.
Artwork on the cards? Almost certainly lifted from other people, and then had a few photoshop filters slapped on top. Unless for some reason the dev is capable of making both realistic 3D human renders and decent generic anime elves, but for some reason decided to do neither for the larger pieces of character art.