Main game

Three teams competed, each often consisting of a brother and sister. The front game was played in two rounds.

In Round 1, the brothers were "teleported" to the "Isolation Zone" using special effects and a video edit (i.e., taken offstage to a soundproof room). One of three pun-styled categories was chosen at random by hitting a plunger, and Faso read a question loosely based on the chosen category. Three questions were played, with each sister choosing one category, and all three sisters responded to every question.

After the sisters' answers were recorded, the brothers were brought back onstage and asked the same three questions. If a brother's response matched his sister's, the team scored points (25 for the first question, 50 for the second, and 75 for the third). If the responses disagreed, no points were awarded. Round 2 was played in the same manner, but with the sisters taken offstage and the brothers providing initial answers. Question values were increased to 50, 75, and 150 points.

The game continued until both rounds were completed or one team had built up an insurmountable lead. The highest-scoring team received a $1,000 savings bond and advanced to the "Pick-A-Prize Arcade" for a chance to win bonus prizes. The other teams each received consolation prizes, including a copy of the I'm Telling! home game.

If two or all three teams were tied for first place after the second round, a tie-breaker question was asked to determine the winner. Before the show, the producers filled a large container with many of the same object and each team wrote down their guess at the number of objects. Whichever team came the closest to the actual number without going over advanced to the Pick-a-Prize Arcade.

Pick-a-Prize Arcade

At the end of the game, the set was rotated 180 degrees to reveal the Pick-a-Prize Arcade. Twenty prizes were displayed, 10 designated for each sibling; the brother's prizes sat on yellow platforms while the sister's sat on pink ones, and a strobe light and pushbutton were placed next to each prize. Prior to the show, each sibling chose the six prizes that he/she thought the other would most like to have.

The home audience was shown one sibling's choices, after which the other one selected six prizes by pushing their buttons. Every time the siblings' choices matched, a siren sounded and the light next to that prize flashed. After both siblings had taken a turn, the team won all prizes they had matched; if they made at least 10 matches between them, they won everything.