Hey Mantis! I'm sorry to hear that your game isn't launching properly. There are a couple reasons why you could be encountering this, so we can look into it if you'd like. As a rule of thumb, it's recommended to check over our dedicated Rainbow Six Siege technical guide[www.ubisoft.com] as these can resolve many assorted performance, launching, and crashing issues. Sometimes background applications can cause conflicts with games, so it would be worthwhile to disable them[support.ubisoft.com] in order to determine if one could be causing an issue. If you're trying to use Vulkan, I recommend looking over this FAQ[www.ubisoft.com] as the steps may prove useful to you in regard to crashing! Should the issue persist, do not hesitate to reach out on the Support Portal[www.ubisoft.com] and provide your system files[support.ubisoft.com] so that the technical team can further look into this with you!