The Venetica Wiki is a good source for most information, on the game, but it's not a walkthrough.

It does have a Walkthrough Page, Walkthrough | Venetica Wiki, but I found them all lacking

Discorsi -- The Other Strategy Guide
This looks promising, but is more a "Story, of my Play through, type presentation, interesting, but not really the sort of thing, you can really use as a walkthrough, or strategy guide, and it stops before entering the Arsenal District.
As a Walkthrough it's lacking in so many ways.

Guide to Venetica's Mental Skills
A very thorough guide, and on the Wiki, but limited to the Mental Skills, but that's clear from the title. So no complaints

List of External Walkthroughs by Players
Both are dead links, so we turn to Internet Archive: Wayback Machine, to find them.
Venetica Walkthrough on BrightHub by Theinkandpen (Short; San Pasquale only)
A link exists, but that Bright-Hub page has been removed, and Wayback redirects to what appears to be the real source, of the post (Or it's moved), a live site
Venetica Walkthrough - Quests in San Pasquale and the Wilderness
You've barely started the game, and the guides done, so another sorely lacking source

Walkthrough by Unknown (dead link)
The least promising source, even the Wiki tells you it's a dead link, but at least we have a link, to go Wayback with.
What do you know, the least promising source, is the only full game walkthrough I've found.
It's also quite a good one, and combining it with the Wiki, gives all the info you need, especially for things the Wiki misses out, like Boss Fights.

So here it is, and though the Wiki says Author is unknown, it's seems pretty certain from the response answers, that it's the user named "Chris".
The Complete Venetica Walkthrough | Casualcore Gaming

Thanks for the info and the links:)

Have you managed to view the whole page for this link as it doesn't load properly for me at all - lots of gaps and missing images. I've tried three different browsers with no luck on any.

Yes I got all the page with all images, there are four flash player video files, that were empty/broken.

I've made a ODT Format copy (Use Libre Office, a free Office suite like MS Office, to view files).
It was made for my own use, credit goes to original Author.
Also a PDF of Treasure Maps, were originally German, but I Google Translated the bit of text.

Also in the Mega Linked Folder are some mods I made.
File titles explain contents, all extract to Game Folder.
Clothing is all Vanilla Armours, which are 1k in game., I provide Sharpened 1k, and 2k variants.

Vanilla Hair is only 256 pixels, so three size increases to choose from, but I only recoloured the 2k ones.
Common Hairs are used with all the colour variants

Venetica - The Complete Venetica Walkthrough And Treasure Maps, and some Mods I made, for my own use

Thank you so much, they will be so useful. And thank you too for the mods, I'm looking forward to testing out a new look Venetica :)