Collected 5 corona related items in part one
Picked up the gas mask like everyone
Completed part one
Picked up the mask faster than anyone else, you know your way
Killed all corona monsters attacking the truck
Collected 5 corona related items in part two
You know how to use a Z Arena Gun
Completed part two
First wave of many
A way to better things
Reached round 10
Reached round 20
Reached round 25
Upgraded your first weapon
Just found the special machine
Killed 100 Total enemies
Killed 500 Total enemies
Killed 1000 Total enemies