Achieve 100% synchronization in Jack the Ripper.

Unlock 50% of the skills.

Kill an enemy as they are calming their panicked allies.

Cause a panicked enemy to kill another enemy.

Complete Memory Sequence 6.

Complete the World War I simulation.

Synchronize every Viewpoint in London.

Acquire all of the Gang Upgrades.

Reach Level 10.

Complete Memory Sequence 4.

Collect all of the Royal Letters.

Acquire ten Perks.