The contestant starts at the bottom of the hill, with a water pistol and a paper ring stuck on their helmet. They need to climb up the hill to reach the fort at the top, but coming down the other way, trying to stop the contestant, is a guard dressed in a random costume.
The guard also has a ring and a water pistol. As they reach each other, the contestant and guard have to try and break each other's rings by shooting water at it.
If the contestant breaks the guard's ring first they win, and can go through the fort at the top of the hill to move onto the next game. However, if the guard breaks their ring first, the contestant loses and is sent back down the hill.
In later episodes, the rings were moved from the helmets and onto the water pistols.
On one occasion, all the contestants had to climb the hill at once, while 12 guards protected it at the same time. The contestants had to break all the guards' rings to win the game.