Hi Jones. The downloader client will be in the future, but the game will always require internet because in the future there will also be PvP battles.
That's cool. I agree with Jonesy in regard to the downloadable version. There are times I take my laptop places and I don't have internet. It would be nice not to have to log in or anything with just base AI or a campaign. I feel like these furry NSFW TCGs are hard to come by and it would be nice to have an offline version as well. Or at least have an offline mode if the internet if fudgy. It looks really good tho, and I'm excited for what else you have in store!