Safe Cracker is one of the games in Arena 39 at The 39 Clues website. However it is currently getting fixed.
Instructions[]
Safe Cracker is like any other card matching game. The goal is to turn over pairs of matching cards, to clear them. One match is worth 50 points. You will also get points if you clear the level before the time runs out. One sec. is worth 10 points. Once the time runs out, each of the remaining cards will deduct 25 points from your score, and you will move on to the next level. There are three levels total.
Medals []
| Medal | How to Obtain this medal | Picture |
| Safe Cracker Bronze | Achieve 1,500 Points |  |
| Safe Cracker Silver | Achieve 3,000 Points |  |
| Safe Cracker Gold | Achieve 5,000 Points |  |