Battle of the Gods (1999)

A very light and simple two players card game by Bruno Faidutti, published in the Japanese game magazine Gamelink.
The Battle of Gods is a variation on the good old game of War, as played by kids.
The first new idea is that cards are played in pairs. First, each player plays a card. Cards are revealed, and then each player plays a second one, and their values are added. This makes for some interesting bluffing.
The second new idea is that there are 6 sets of 12 cards, for six different mythologies. In each game, each player plays a different mythology. In each set, two or three cards have special effects when played, making for interesting combos and even more bluffing.