Cook food in the oven in Challenge mode 20 times

Break any tool

Complete any 25 repairs in Challenge mode

Fire a gun 20 times in Challenge mode

Turn on generators 100 times in Challenge mode

Use a first-aid kit 100 times in Challenge mode

End the game in Challenge mode with one survivor

Resuscitate a character 30 times in Challenge mode

Eat 50 coffee beans in Challenge mode

Find every tool in the game

Cook every kind of food in the oven during a single game

Don't sleep in the first zone in Challenge mode

Saw up nine crates during a single game in Challenge mode

Smoke 10 cigarettes during a single game in Challenge mode

Break six objects while under the influence of the "Burst of anger" madness during a single game in Challenge mode

Finish four zones in a row without breaking a single door in Challenge mode

Earn the good ending in Challenge mode

Earn the second bad ending in Challenge mode

Complete the game with three characters in Challenge mode

Find and save the third character on the base in Challenge mode

Unlock every character

Use the trap to destroy the electrical anomaly in Challenge mode

Charge the reflector once in Challenge mode

Add fuel to furnaces 50 times in Challenge mode

Turn mad for the first time in Challenge mode

Exit the first zone in Challenge mode

Exit the second zone in Challenge mode

Exit the third zone in Challenge mode

Exit the fourth zone in Challenge mode

Acquire "Burst of anger" madness for the first time in Challenge mode

Acquire "Intolerable hunger" madness for the first time in Challenge mode

Acquire "Shakespearean expert" madness for the first time in Challenge mode

Acquire "Night vision" madness for the first time in Challenge mode

Acquire "Color blindness" madness for the first time in Challenge mode

Acquire "Strange whisper" madness for the first time in Challenge mode

Acquire "Obsessive singing" madness for the first time in Challenge mode

Acquire "Crazy laughter" madness for the first time in Challenge mode

Acquire "White noise" madness for the first time in Challenge mode

Acquire "Attacks of aggression" madness for the first time in Challenge mode

Acquire "Occult enlightenment" madness for the first time in Challenge mode

Acquire "Hallucinations" madness for the first time in Challenge mode

Acquire "Space distortion" madness for the first time in Challenge mode

Acquire "Myopia" madness for the first time in Challenge mode

Acquire "Hyperopia" madness for the first time in Challenge mode

Acquire "Gluttony" madness for the first time in Challenge mode

Acquire "Doubtful utility" madness for the first time in Challenge mode

Acquire "Homesick" madness for the first time in Challenge mode

Earn the secret ending available in Challenge mode

Earn the first bad ending in Challenge mode

Acquire "Too much" madness for the first time in Challenge mode

Leave a living character behind when proceeding to the next zone in Challenge mode