The only game that explores the books' themes in any meaningful way is LobCorp. And maybe Ruina with some of its Borges influences.
Limbus is very surface-level stuff, except maybe for Yi Sang's chapter. What little I read of his poetry, novels and biography seemed to be reflected in the game, it looked very well-researched, but I can't really judge it as I'm not a gook who had to learn about him in school.
I think the game that did the whole "book influence" thing the best is Black Souls 2, it really dug deep into Carroll's biography and theories as to just what the fuck happened between him and the Liddell family.
Moby Dick but I remember I have it at home and I read a bit and I didn't like it.
You should treat it as an epic poem in prose format, not a regular straightforward novel. I recommend reading Shakespeare and Milton before you tackle it.
One often hears of writers that rise and swell with their subject, though it may seem but an ordinary one. How, then, with me, writing of this Leviathan? Unconsciously my chirography expands into placard capitals. Give me a condor’s quill! Give me Vesuvius’ crater for an inkstand! Friends, hold my arms! For in the mere act of penning my thoughts of this Leviathan, they weary me, and make me faint with their outreaching comprehensiveness of sweep, as if to include the whole circle of the sciences, and all the generations of whales, and men, and mastodons, past, present, and to come, with all the revolving panoramas of empire on earth, and throughout the whole universe, not excluding its suburbs. Such, and so magnifying, is the virtue of a large and liberal theme! We expand to its bulk. To produce a mighty book, you must choose a mighty theme. No great and enduring volume can ever be written on the flea, though many there be who have tried it.