Here is the full list of all 51 Protocol achievements.
Found all the possible ways to violate the Protocol.
No violations during the game.
Use all the drugs in the complex.
Throw any object back at the alien.
Used a hint 100 times.
Took a shortcut in the chapter "You have violated the Protocol".
Vaccinated the alien.
Fetched the hand in ending 3.
Got ending 7.
Got ending 4.
Learned RAT-DG terminal's functionality.
Found all dead ends in the Technical area.
Started the fire.
Administrated the "dubious" drug again.
"Called" a combat drone.
Found all the hidden Easter eggs during the "system configuration".
Defeated a drone projecting AI many times.
Got ending 3.
Used a hint 50 times.
Defeated the first "boss" without damage.
Got ending 1.
Ignored contactees' warning.
Died during the training.
Passed hacker's first mini-game.
Interrogated the alien using a teapot.
Threw soap at the alien when you first met it.
Entered the iconic password in the first terminal.
Rolled down a hill.
Threw any object except a snowball.
Forgot to take a keycard in the capsule.
Death from suffocation.
Death from the fire.
Got ending 2.
Got ending 0.
Got ending 5.
Saw the scene after the credits.
Got ending 6.
Destroyed the complex.
Guessed the correct password from the Residential unit's door.
Used the terminal's "chat".
Complied with Wilson's request.
Passed chapter "Penetration" without damage.
Defeated the third "boss" without damage.
Defeated the second "boss" without damage.
Found a screamer in chapter "Penetration".
Used a hint 10 times.
Find a way to go into the far future.
Forgot a keycard in the lighting terminal.
Violated the Protocol for the first time.
Threw a snowball.
Used a hint for the first time.