Patents related to games are facing new challenges for being too “abstract,” but a recent court ruling highlights the limits to this line of attack. Last year, the Supreme Court reinvigorated a body of law that defines the types of inventions eligible for patent protection. Generally, inventions deemed “abstract” are ineligible for patenting, unless there is some other inventive concept in how the invention is implemented. Defendants accused of infringing game-related patents have seized on this body of law to challenge issued patents as being mistakenly granted. But in these challenges, what counts as “abstract” has been subject to much debate. So new court rulings on patent eligibility of interactive-entertainment technologies are worth noting. A recent decision should comfort game-patent owners.