Thumb wrestling is a game almost everyone has played across a table. Extreme Thumb War brings it to the screen and dresses it up: you choose from more than twenty thumb characters, each with its own costume, then face a friend or the computer in a best-of thumb fight.
Two bars decide every match. The health bar shows how much damage your thumb can still take. The power bar shows how long you can keep pressing down on your opponent. Land on your rival's head and hold, and you keep dealing damage until your power runs out. Let go too early and you waste a good hit. Hold on too long with an empty power bar and you leave yourself open to a counter. The first thumb to lose all its health is beaten.