Walkthroughs for custom maps.

I could probably try to play it in English (at least in a general sense), but I don't even know the letters in French.
It's best to translate based on meaning, otherwise the machine might come up with something terrible... So, to avoid headaches, I prefer Russian-language maps. Luckily, there's no shortage of them.

And try playing it yourself if you want)
Les prйmices de l'Apocalypse.
It's very good, in my opinion.
There are Chinese maps like Xiedu, Way Home, and Lord of Rings - however, they can be played even without the storyline, that's what makes them hardcore.
Let's be honest - the storyline isn't important for maps at all if they are interestingly made.
An interesting map in terms of tactics, concept, and battles is much better than kilometers of text in an XL map, where there's nothing else.