But does it modify them to give you an unfair advantage, surely this "mod" is just forcing the software (launcher ) to run in another piece of software (dx12 file ) to improve the gameplay, unless it does other things aswell, ( havent played around with it ) I'm fairly certain that it's a blanket clause that simply says you are not allowed to modify any game files for any reason, and then it specifies a number of examples that people might commonly edit game files for Took me all of 10 seconds to find a clause for you https://www.guildwars2.com/en/legal/guild-wars-2-user-agreement/True, but then arcdps is a violation as well (it modifies the exact same file) and Anet dont mind that last I checked. Anyway regarding this mod... I just hope it kicks up enough fuss to get Anet to do it officially instead.And that's why it's a blanket clause: catches anything and everything that could fit the criteria. So usually these things fall under a severity rule where, if deemed serious enough, they could take action against it (like warning the user, or banning them for 3rd party use). I don't think they will ever truly accept the use of third parties. They have to be extremely careful because of the nature of their business, and not whimsically accept every third party software that comes into the market. That and I doubt they're going to staff anyone who's only job is to investigate third parties, when they could be doing many more things elsewhere in game development and the like. So "use at your own risk" is probably still the answer everyone is looking for.