Cryptography
Unravel ciphers and encrypted messages using various methods and algorithms
A confusing cipher
Difficulty: Easy
Completed task: 221
Reward for completion: 200 points
Hills
Difficulty: Easy
Completed task: 193
Reward for completion: 200 points
Word for word
Difficulty: Easy
Completed task: 173
Reward for completion: 200 points
Custom
Difficulty: Medium
Completed task: 110
Reward for completion: 350 points
Watchmaker
Difficulty: Hard
Completed task: 122
Reward for completion: 500 points
ABC
Difficulty: Easy
Completed task: 602
Reward for completion: 200 points
Relatives
Difficulty: Easy
Completed task: 523
Reward for completion: 150 points
Bookworm
Difficulty: Easy
Completed task: 531
Reward for completion: 200 points
Disposable notebook
Difficulty: Medium
Completed task: 316
Reward for completion: 350 points
Zero cipher
Difficulty: Medium
Completed task: 121
Reward for completion: 300 points