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