Double Up is a single-player mini-game that could originally only be found in Crystal Sands and was later added to the Sol Arcade. It was first introduced in August 2011. It can also be found in Jammers' Dens in the form of the Double Up arcade machine, the den item.
The objective of this game is to match all of the animals with their doubles before the timer ends. When the game starts, the player is given three seconds to look at where all the animals are on the game board before they are hidden. The player can click on two slots at a time to reveal the animals hiding at those slots. If the animals are doubles of one another, they will remain visible and count as a match. The game ends when either the player finds all the matches or 60 seconds runs out on the timer.
This game rewards the player with Gems depending on how many matches they find. Each successful match will reward 3 Gems and matching all eight pairs will reward an additional 20 Gems.
There are six achievements that can be earned by playing Double Up:
- The animals seen in the game appear to be a great blue heron, toucan, tiger, bunny, monkey, wolf, koala, and panda.
- This game has no extra levels or difficulty options.
- This game is similar to Pairs in that they both feature match-making.