Every Cease and Desist order takes time to evaluate, and that is a cost.
If it is a legitimate letter and not some sort of bulk spam mail, you need to have your lawyer review it, which costs time and money.
After discussion with your lawyer you can decide what to do, from ignoring the letter to responding to the letter and doing what they want, to doing the opposite of what the letter demands,
publicly mock the letter, and use it to generate over $100,000 for charitable causes. I wouldn't choose any of those options without talking to a good lawyer on the matter, which is a cost.
If you take some action you are best to send a reply to tell them you are doing what they requested, and the wording should be careful, needed a lawyer to handle, which costs time and money.
A C&D order is not legally binding itself, but it is a small legal action and a normal precursor to bigger legal action. The exact wording of the letter and the reply, and the wording of other comments (like these on this site) can be used against you in court. When companies are serious about wanting you to change your behavior, they may start with a C&D and if they aren't happy they may move on to bigger proceedings. That will cost LOTS of money.
So assuming the company does come after you, and they put the quote into Google to see where it comes up, then this conversation will appear -- either directly, or in the comment history if you attempted to somehow hide it, or on sites like Google's Archive and Archive.org and other major sites that are continuously archiving the web if the site hides it. The Internet doesn't forget, and there are plenty of archives available. (You can even browse the web like it was 15 years ago using Google's archives!) And from those archives, they'll be able to read that not only was your use deliberate, it was calculated based on the risk and potential cost of a lawsuit. That sort of thing does not impress judges (at least, not in your favor).
Personally I would not use that quote. If he wants to write on his own site comparing your game to Dragon Age, as his own opinion, then let him. If he wants to put that in a review on a major review site, fine. If he's a writer for a major industry site and wants that as the headline for everyone to see, great. His site, his opinion, let him do it.
But the topic is not his speech. The topic is YOUR own speech (quoting him), done for you, on your own marketing materials. No way would I want that line about comparing my product to Dragon Age on my own marketing materials unless my company name was BioWare and the lawyers and marketers at my parent company EA approved it.
In advertisements you see comments like "9000x better than the competitors", or "Just as good as the industry leading brands". It is a rare thing for those competitors to be mentioned by name, and when they are, it is usually followed with an asterisk and a bunch of disclaimers the lawyers required. Again, those footnotes carefully written by lawyers, which has a cost.