Just finished 100%ing this and thought I'd post some things that will hopefully help others- both in starting out+in finishing up. I'll keep an eye out for q's for the next few days if anybody has them, though I'm no expert.
-I recommend simply playing blind at first (other than maybe looking at endings on the wiki), there's a lot of fun in discovery and the rewards are scattered in such a way that it'll be a while before you stop accidentally finding stuff.
-Once you only have 100 tokens left to find, I'd start using the wiki to tailor runs to knock off achievements, since at that stage most things will require specific starts.
-The Crime Machine is a permanent purchase and a gamechanger. You can use it to redo actions while keeping the effects of the initial action, and there is no downside, so feel free to experiment with it. I didn't use it for a long time because the description made me think I could bork my save.
-The Black Book, Oblivion Parasite, Token Box, Wapal Indulgence and Dreamochrome (in order of usefulness) are also permanent and handy.
-The items that stop stat growth are very situational.
-I wouldn't buy the Red Dossier until you've completed nearly everything else+ have God Emperor ready to go. If you buy it early it'll just confuse you (sadly AFAIK you can't get all the girls in one run, you have to use summoning which I found pretty anticlimactic.)
-This post is super important if you want to get all the Wedding Bell endings.
Kulingile: I think this is the answer to your problem. (Keywords for search: Sandy Prison, choose, chose, choice, multiple, ending, missing).
I found a bug that prevents the choose your fate option from appearing after getting the X1 ending.
This makes unlocking wedding bells "your own daughter" (and probably others) extremely difficult as you will probably also unlock different endings.
In the html this:
HTML:
/* ADDS UP ENDINGS, TOTAL OR TOTAL UNIQUE? */
<<for _k = 0; _k < $endings.length; _k++ >>
<<if _k==0 >>
<<set $endings[0] = 0 >>
<<else >>
<<set $endings[0] += $endings[_k] >>
<</if >>
<</for >>
Should be replaced by
HTML:
/* ADDS UP ENDINGS, TOTAL OR TOTAL UNIQUE? */
<<for _k = 0; _k < $endings.length; _k++ >>
<<if _k==0 >>
<<set $endings[0] = 0 >>
<<elseif $endings[_k] >>
<<set $endings[0] += $endings[_k] >>
<</if >>
<</for >>
-nearfar3165's excellent post with the secret tokens didn't describe "fantasy" completely.
Step 1- Get recursivest token as described by nearfar.
Step 2- Make the original Kia your wife via conversation with her
Step 3- Call Kia and tell her to move your family in as a harem.
I am having a bit of trouble with Izolda, can you only take her home if you have a wife and she becomes your daughter, or is there another way?
If you're talking about marrying her, I was confused too. The process is to pay->meet->don't suggest she becomes your daughter->have her agree (I think you have to have low brute)->have sex /w 16SP->
leave->leave her alone until the ending, with normal wedding requirements. You can't have her marry you pre-ending.