- X
- X Japan
- X-Cops
- X-Drive
- X-in June
- X-Ing
- X-Marks the Pedwalk
- X-Mas Project
- X-O-Planet
- X-Sinner
- X-Tinxion
- X-Vivo
- X-Wild
- Xalpen
- Xandria
- Xasthur
- Xasthur Vs.Leviathan
- xDeathstarx
- Xehanort
- Xenogenocide
- Xenomorph
- Xenos
- Xentrifuge
- Xentrix
- Xeper
- Xerath
- Xerion
- Xero
- Xibalba
- XII Gallon Overdose
- XIII. Století
- Xiom
- XIV Dark Centuries
- Xorcist
- Xordia
- XT
- Xysma
- Xystus
- XYZ