I have worked carefully to recreate each theme onto the piano.  Some arrangements are more tasteless than others, but I include everything here for the sake of fun.  Don't let these pieces indicate to you my abilities.  They are only for diversion.

From Nineteen Works for Solo Piano:

Final Fantasy I: Airship [PDF] - [MID]
Final Fantasy IX: Jesters of the Moon [PDF] - [MID]
Final Fantasy XI: The Federation of Windurst [PDF] - [MID]
Final Fantasy XI: Airship [PDF] - [MID]
Chrono Trigger: Manoria Cathedral [PDF] - [MID]
Chrono Trigger: A Prayer to the Road that Leads [PDF] - [MID]
Chrono Trigger: Frog's Theme [PDF] - [MID]
Chrono Trigger: Wind Scene [PDF] - [MID]
Super Metroid: Boss Battle [PDF] - [MID]
We Three Kings [PDF] - [MID]
Stille Nacht [PDF] - [MID]

Works not included in that anthology:

Final Fantasy X: "I Want To Tell You Everything" [PDF] - [MID]

Note: This piece is based off of an eight-second speech track from Final Fantasy X.  When I first saw that no one had plans to arrange it, I set out to make it more musical!

Chrono Trigger: Gato's Theme [PDF] - [MID]
Chrono Trigger: Silent Light [PDF] - [MID]