ACHIEVEMENT - HOW TO UNLOCK Charming infiltrator - Completed chapter 4. Genius! - 50 puzzles completed without using hints. Jailbreak - Completed chapter 2. King of the hood - Completed chapter 3. Love is in the air - Sara rescued. Mastermind - 50 puzzles completed. Mission bound - Completed chapter 1. Promising student - Completed the tutorial. Sleuth - Completed game story. Training day - Earned a hint key on each of the six brain training exercices.