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