Played for at least 1,000 turns.
Used a hint, ignored the instructions but finished the level anyway.
Killed 2 enemies at once.
Thrown an object without alerting anyone.
Killed 100 Static (Blue) enemies.
Killed 100 Pair (Grey) enemies.
Died at least 200 times.
Played for at least 100 turns in a single level.
Worn the first three disguise types.
Killed 100 Patrol (Yellow) enemies.
Killed an enemy by emerging from a Secret Passage.
Crushed three enemies under a falling statue.
Got chased by three guard dogs simultaneously.
Complete all objectives in the first chapter.
Completed all objectives in the second chapter.
Completed all objectives in the third chapter.
Completed all objectives in the fourth chapter.
Completed all objectives in the fifth chapter.
Completed all objectives in the sixth chapter.
Completed all objectives in the seventh chapter.
