Melee-kill or stun 50 enemies.

Put 10 guards to sleep with blowdarts

Synchronize all viewpoints

Discover Basim's past

Name the locomotive.

Patch the Gasmask.

Eliminate the Head of the Order

Obtain both disguises

Hit 3 enemies with a single roller mine

Defeat a Shakiriyya in combat

Complete the main storyline.

After reviving with Second Heart, kill or incapacitate the enemy who killed you within 5 seconds.