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