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