Make 200 health stacks
Heal yourself a lot
Walk 50 km
Take 400 levels cumulated
Take 1000 damages during a single run
Collect 1000 XP orbs
Attack 150 monsters at close range without being spotted
Slow 12 monsters at the same time with the flashlight
Turn on the flashlight (30 min)
Kill 40 monsters in a row without using the flashlight
Kill an elite monster while being under 2 health points
Inflict 1000000 damages to monsters
Kill 120 elite monsters
Kill 100 monsters using gadgets
Kill 400 monsters using the pistol
Kill 400 monsters using the rifle
Kill 400 monsters using the shotgun
Kill 400 monsters using the sniper
Reload 750 times before emptying the magazine
Collect 120 gadgets
Hit 1000 monsters at max weapon range
Kill 100 monsters with the last bullet of the magazine
Empty 250 times the magazine without missing a single bullet
Kill 15 monsters during a single ability
Kill 150 monsters without being spotted
Kill at least 5 enemies with every type of basic weapon in a single run
Escape for the first time
Kill 6 monsters with a single grenade
Kill 8 monsters with the molotov in a single run
Unlock 2 heavy weapons
Find the boss
Escape in less than 15 min
Defeat the boss for the first time
Reach Level 25
Take 4000 damages from monsters