User blog comment:Linktube/Notch Challenges Bethesda to a Duel over Lawsuit/@comment-1814074-20110818174826/@comment-173.242.89.38-20110821034906

The reason they are pursuing legal action with Notch over his trademark of "Scrolls" is because of the way trademark law works (you have to defend against any potential threat to your trademark or you risk losing it) and the various similarities between the two products (besides the "Scrolls" bit, Notch's game appears to be fantasy themed and may well include some RPG elements, so despite the two products being mostly different in terms of gameplay, there is actually a case for similarity). In addition it should be noted that multiple companies can trademark the same word (like "Scrolls" or "Rage") so long as they're specified for different things. E.g. There's a company that has a trademark on the word "Rage" in relation to pesticides and this trademark can co-exist with Id's "Rage" trademark in relation to computer-games.