Xiom is a progressive death/thrash metal band from Chemnitz, Germany, formed in 2021. They weave together progressive structures, death metal heaviness, and thrash metal aggression into technically complex compositions that push beyond conventional genre boundaries.

Xion is a thrash metal band from the Dalarna region of Sweden, formed in 2018. They play aggressive, riff-driven thrash metal from the heart of Sweden's metal-rich landscape, a country legendary for its extreme music output.

Xipe is a heavy metal band from Vicenza, Italy, formed in 2022. They play traditional heavy metal rooted in the Italian metal tradition, delivering powerful riffs and classic song structures from the Veneto region of northeastern Italy.

Xipe Totec is an atmospheric/technical death metal band from Imola near Bologna, Italy, one of the country's oldest extreme metal acts, having formed in 1995. Named after the Aztec deity of spring and renewal, they blend technical precision with atmospheric depth across a discography spanning nearly three decades.

Xiphoid is a speed metal band from Leuven, Belgium, formed in 2019. They deliver high-velocity riffs and aggressive energy in the tradition of classic European speed metal, contributing to Belgium's thriving underground metal scene.

XisForEyes is a progressive black/death metal band from Newcastle upon Tyne, England, formed in 2013. Their releases including "Convoluted Enlightenment" and "Absolute Corporeal Besmirchment" blend symphonic elements with progressive black and death metal into dense, technically accomplished compositions.

XIV Dark Centuries is a pagan metal band from Zella-Mehlis in Thuringia, Germany, active since 1999. Their lyrical themes center on Germanic paganism and the Thuringian tribe, with a discography spanning over two decades including albums like "Waldvolk" (2020) and "Aus uralter Zeit" (2025), making them one of Germany's most enduring pagan metal acts.

Xonor is a thrash metal band from St. Gallen, Switzerland, formed in May 2020 by four young musicians from Eastern Switzerland who originally called themselves Honor. Despite pandemic limitations, they built a global fanbase through social media, releasing the "Pandemolition EP" and the album "All Honor Lost."

Xostroth is a black metal project from Kazanlak, Bulgaria, formed in 2007. The project channels the raw and atmospheric side of black metal, contributing to Bulgaria's small but dedicated extreme metal underground.