For destroying 5 buildings to build a new one instead

For launching 5 ozonizers to purify the water

For removing an obstacle with explosives for the first time.

For repairing 2 suspension bridges

For searching 10 ruins with rescue dogs

For draining floods using the power pump on level 3

For repairing the first train station

For extinguishing 5 burning turf swamps

For repairing 3 electric vehicles

For building 10 hospitals

For arresting 15 diggers

For ordering the first delivery

For repairing 3 electrical substations

For cleaning up the lake

For repairing 25 stores

For feeding the fire with firewood

For extinguishing the fuel warehouse on level 18

For eliminating toxic emissions over the town

For driving away 15 snakes

For rescuing 5 people from the water with dogs

For shutting off the valve and stopping the dangerous gas leak

For collecting 50 immortalites since the start of the game

For evacuating people by train

For treating 5 animals for panic

For collecting all rare minerals

For turning off the first bucket-wheel excavator

For repairing 5 helipads

For repairing the first broken pipeline

For repairing 3 boat stations

For saving 5 cats. Careful, they might scratch!

For eliminating 15 power-line junctions from the start of the game

For searching 15 diggers’ tents

For eliminating the first fireball

For evacuating people from the mountain on level 6

For repairing two communication towers since the start of the game

For repairing the first alarm system

For repairing the acid storage on level 42

For purifying contaminated soil

For rescuing 5 dolphins from nets since the start of the game

For cleaning the pond of oil slicks on level 55

For planting 5 trees

For removing all molds on level 37

For turning off 15 jammers

For eliminating short circuits on level 43

For the first excavation of mineral deposits

For stocking the pond on level 24

For eliminating 10 methane emissions

For filling 3 barrels with water

For rescuing all dogs on level 35. Careful, they might bite!

For the first delivery of fragile goods

For catching 5 quadcopters