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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As a few others have said, most distributions are good for gaming. Arch, being a distribution that requires lots of manual configuration, requires some setup for the best performance.
Read these two articles throughly and use the tweaks that apply to your system/needs.
Straight from the Arch Wiki:
Gaming (section 7 and section 9 are especially useful).
They can all be good for gaming. The distro doesn't matter. Use what you find efficient, pretty, customized to your liking. They can all game. Don't install Popos because it's gaming oriented you can game on vanilla arch if you wanted to or debian. Arch won't matter much unless you have the newest hardware.
LTS distros and extremely delayed packages can give you problems for sure, the components used for gaming are very fast moving pieces fixing latest issues constantly.