Survive the third wave
Upgrade the generator to the third level
Win without losing a single follower
Walk 42,195 meters
Kill 50 mutants
Kill 25 caterpillars as a hero
Find all notes
Survive the second wave
Losing stalkers during an expedition to the surface
Kill 1000 mutants
Get fuel
Build a generator
Pick up the stalkers on the other side of the bridge
Die from a flower
Get rank B or higher
Get rank A or higher
Earn 0 points
Get the S rank
Kill the flower
Upgrade the generator to the second level
Build all workshops
Kill 100 mutants
Lose on the first day
Kill 10,000 mutants
Fully arm the trolley
Survive the first wave
Take a ride on a trolley
Kill one mutant