When the Riddler escapes from Arkham Asylum, the Dynamic Duo discover he
has a museum in his sites. But the Riddler's riddles reveal he doesn't
just steal from the museum, he actually makes off with the whole thing!
With the help of World War II-era decoding machines, the Riddler takes
command of the Gotham City Military Museum--a fully-functional
battleship! Now it's up to Batman and Robin spoil his plans before he
blows Wayne Manor, and the rest of Gotham City, out of the water.