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Linux vs Windows tested in 10 games - Linux 17% faster on Average
(video.hardlimit.com)
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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I do all my gaming on my Steam Deck and I haven't run into anything that didn't work – even "unverified" games. But I also eg. don't play any multiplayer games so I don't have troubles with anti-cheat systems which are apparently still a big pain point for Linux gaming and might be one reason for your bad experiences