Here is the full list of all 35 SCP: Secret Laboratory achievements.
Let SCP-173 snap your neck.
As an SCP, kill someone who's charging or firing the MicroHID.
Successfully escape from the Pocket Dimension.
Cancel the Alpha Warhead detonation within the last 15 seconds of the countdown.
Survive a successful Alpha Warhead Detonation.
Kill 50 D-Class as a Scientist.
Die while entering a rage as SCP-096.
As a Scientist, successfully upgrade your keycard alongside any amount of Class-D.
Kill an SCP as a Scientist.
Kill an SCP with the Micro HID.
Disarm a MTF operative
Use SCP-500 when you're about to die.
Try to recharge the MicroHID.
Liberate two or more SCP objects from the facility while escaping as a Class-D.
Escape while under the effects of SCP-207.
Use adrenaline to survive a hit that would otherwise kill you.
Kill 5 enemies in less than 30 seconds.
Cure 10 people in a single game.
Die from a fall.
Kill yourself with a grenade.
Escape as D-Class personnel.
Escape the facility in 3 minutes or under.
Escape as a Scientist.
As Class-D, kill a Scientist holding a keycard.
Pick up an O5-Keycard.
Play the Christmas version of the game.
Successfully re-contain SCP-106
Find any gun as a Class-D.
Die inside the pocket dimension.
Die from a Tesla Gate burst.
Broadcast a 'helpful' message via the Intercom.
Respawn as Nine-Tailed Fox.
Play the Halloween version of the game.
Respawn as Chaos Insurgency.
Die within the first minute of the game.