My answer is based on a google search yielding results like this:
It would seem unprofessional to me. I would even go so far as to say I would rather go in with nothing or a simple typed letter than with something that would be so unprofessional.
Having something so stylized and functionally useless amidst my business cards is a bit like having those advertisement leaflets sent to you along with your mail. First thing I’m likely to do is throw those out.
The business card should be styled and unique, and bring your conversation to mind when someone sees it but it should still be a business card.
The worst effect your cards could have, and this seems pretty likely to happen unless you are well-prepared, is that your victorian acquaintence card content actually becomes a distraction for your conversation, not only leading your topic in a direction away from game design and professional inquiries but also giving the encounter a joking and trivial impression in hindsight. I think its better to not have cards than to give out cards that can be destructive to your intended purpose.
In addition to style concerns, a lot of people use software to scan and organize their business cards. You want the cards to be machine-readable and physically fit in the same container with all the other collected cards.
If you would like something more useful and stylized and professional to hand out that includes your contact info and design demonstration, look up what’s called a “sell sheet”. These are basically a one sheet piece of paper used to communicate a product pitch. They convey all the useful design-related data in a very visual almost-brochure-like flyer with a lot of room for creativity in their design.
You should still have business cards (calling cards) though, if possible, and give one out with your sell sheet.
I recommend a simple but stylized calling card format like this:
It can be tempting to omit the title, but I do not recommend it. When figuring out what title to place, try to imagine the conversations you would like to discuss at the conference.
The card should have a link to your Linkin profile (even if its bare) or portfolio page. I recommend at least linking to a placeholder site for your portfolio if the portfolio is not ready yet. Perhaps your “coming soon” webpage could have the “victorian acquaintance” design you were thinking about.