this list is just real sweet, Clephas, really.
but for akatsuki no goei, i think if you can read akagoei with no problem you'll have no problem reading the harder ones. (speaking from my experience)
excluding series like dies irae, KKK, muramasa, fate... just. dont.
i tend to avoid the vns with full screen text box when i was just starting reading untranslated vns.
what about hapymaher and majikoi?
as for kanjis, you don't need to remember 1500++ kanjis just to read those untrans. just emphasize on the grammar (文法) and particles (の、は、が、に、と...). i even didn't even studied kanji when i started reading akagoei (my first untrans) though i had few confusion back then, i managed it by linking the words and particles.
but i still wouldn't recommend akagoei for first time reader, lol.
seeing nobody has mentioned the tools for reading them, i figure i'll share this here. TA, and ITH
https://kipchu.wordpress.com/2012/08/02/visual-novel-help-translation-tools-for-playing-untranslated-visual-novels/