Rudra no Hihou / Treasure of the Rudras (SNES)

[Barack Obama]

Only Sodom Castle & Garal Clock Tower are left.

A quick list of which maps are missing from this game in general:

Towns
Karn (exterior & interior)
Oriab (exterior & interior, except Castagia's lab)
Avdol (exterior & interior)
Danelf & Vad (exterior)
Danelf (interior)
Vad (interior)
Ompross (exterior & interior)
Babel (interior & exterior)
Gomorrah City (exterior)

Mechanical Structures
Garal Clock Tower
Crater Area (Exterior)
Crater Area (Meifa Statue, Exterior)
Crater Area (Control Room)
Gomorrah City (interior)

Castle Structures
Sodom Castle (interior)
Sacred Gate (ground floor)

Ruin Structures
Tuhla Ruins (interior)

Gold Dungeons
Gate of Urd
Shumisen

Caves
Garal Tunnel (also variant with Danan Ark)
Hidden Village Passage (cave)
Lugh Shrine
Horn Cave
Thor Volcano (interior)
Mantra Peak (interior)
Sigmund Glacier (interior)
Delphi Mountain (interior)
Horn Cave
Deep Sea Trench
Deep Sea Shrine
Cave to Gafu
Netherworld Caves with red water (Riza's scenario where they meet Marina, not sure about the name for these)

Organical Structures
Gafu
Heg Intestines
Netherworld

World Maps
World Map (Underwater)
World Map (several versions before day 8)

Misc.
Verdandi Palace
Saccara Desert
Danan Ark (interior)
Danan Ark (deck)
Danan Ark (overworld)
Danan Ark (Gate of Urd / Skuld & Verdandi Palace)
Danan Ark (Lyra & Underwater Palace / Pyramid)
Danan Ark (Sky Islands)

Only the regular exterior palette counts here, unlike twilight, night & the changed palette for zombified Avdol.