When it comes to gaming, I see this question of "which distro should I use" come up often, and the answers are always the same: just about any linux distribution does the job. None is specifically geared towards or against gaming, but they do offer you different levels of involvement. The more "streamlined" like Ubuntu are very hands-off and require little effort to manage whereas more involved distros like Archlinux or Gentoo come with little more than a terminal right out of the box: they allow you to decide exactly what to install and how, but it can be daunting prospect if you're not familiar with linux. Whichever one you choose though, you're stepping into another world. Different filesystems, different file architecture, different console commands, different everything. There's a few tools available to emulate windows only games and programs (playonlinux, wine, even virtualbox/vmware) but if an alternative is available, you'll want to use the native client instead. Fortunately KSP works natively on linux (as well as steam if you bought the steam version) but depending on your luck, you might have to wrestle with the radeon graphical drivers. I use nvidia so I couldn't tell you how annoying radeon is for this (probably less so, but I doubt it's hassle free). Partitioning can be a pain if you're installing windows and linux on the same disk, because of the different filesystems (FAT16/32/NTFS drives can still be read on linux though). Depending on your hard drive setup, the windows bootloader will probably also have to be overwritten by a linux bootloader and it might not detect your windows installation from the get-go. You'll have to dig into those config files after some googling to figure out how you can get back to your windows install if that's the case. Thankfully, all these issues are well-documented and all you need to get out of any linux mess is some intuitive reasoning and a LOT of google-fu. If that's not enough, post on your distro's forums and there will always be someone there to help you. Linux can be an incredibly rewarding experience if you have the patience to get through it's quirks and don't expect things to work from the onset. It allows you to get a fundamental understanding of how your computer works and, above all else, gives you a CHOICE for everything. No two linux desktops are identical. For a first time user I always recommend Ubuntu (I even recommend making a mock-install from your windows computer using vmware, or just use a liveCD so you can experience linux without the danger of destroying your system) but If you'd like to start with a more involved distro (can't blame you for that, I jumped straight into gentoo 10 years ago), do the install in a virtual environment first to see just what is required of you and, once you're comfortable with the process, go ahead and make the jump!