Does MapleStory work on Linux/Ubuntu?
It looks like some versions of MapleStory can be run with Wine, with some substantial success, but that there is also a long and extensive history of failure. If you already have a copy of MapleStory, you should try it and see. See this page and this page in the Wine application database.
It also looks like people got MapleStory running in an emulated or virtualized environment years ago. (You may want to take that guide with a grain of salt, as it's rather old and may not apply fully now.) So you might try that, if you have a copy of Windows to install on a virtual machine (or already set up).