Also see:
- ..X-COM Series(3)
- ..X-Men Series(2)
- ..X-Plane(17)
- ..X-Wing Series(9)
- ..Xconq(1)
- ..Xenogears Series(4)
- ..XEvil(1)
- ..Xpand Rally(1)
- ..XPilot(2)
- ..X Series(4)