Gargantua is a patience or solitaire card game that is a version of Klondike using two decks.
The foundation/tableau should look like this: As in Klondike, play consists of the following: For dealing the stock, cards from it are dealt to the waste pile one at a time and used if possible.
The stock can only be dealt twice; afterwards the leftover cards are left at the waste pile.
Harp is another two-deck version of Klondike like Gargantua, but the stock can only be dealt four times.
The most simple version involves two packs, with eight foundation stacks rather than four.