Unlock all farm buildings.

Rescue 50 Survivors.

Heal 20 times using the Nurse.

Kill 10 enemies using the Soldier's Flame Thrower.

Poison enemies 10 times.

Reach the City.

Discover the Catacombs.

Finish an Expedition.

Perform the Angelic Protection skill.

Perform the Wrath of Tin skill.

Cure an afflicted ally.