Ace is a field game played at summer day-camps and similar. Although gameplayis fundamentally flawed (the last team to "cash in" on the ace wins, regardless of how many times the other team has.), it is still fairly enjoyable.

Ace is played with two teams on an open field, (although there is a version for woodlands). A cardmaster on each team hands out a card for each person. Whenever someone tags someone else, the person with the highest card gets the two cards to return to the cardmaster, to be re-issued with a new card. "victim"s also get new cards. Someone wiht an ace can be beaten by any card, however if they manage to tag the enemy cardmaster, they take half the deck back to their own cardmaster. Each team's goal is to have as many cards as possible in their cardmaster's deck.