Complete the Tutorial.
Die during the Tutorial.
Pass the Bridge without Stopping.
Pass the Tunnel without Stopping.
Complete Act 1.
Pass the Entrance without Blasting.
Pass the Headquarters without Missing.
Pass the Secret Room without Shielding.
Pass the Cryostasis without Stopping.
Complete Act 2.
Pass the Nursery without Blasting.
Pass the Pethouse without Missing.
Kill the Agent at the Hall.
Defeat the Suit without Shielding.
Complete your Training.
Complete your Training without using Assistance.
Complete your Training without Dying or using Assistance.
Complete your Training in under an hour without using Assistance.
Complete your Training in under an hour without Dying or using Assistance. (from achies)
Complete All The Things, Including Achievements, Including This One, Error, Err.. (clack)
Teaching Mammals to Walk through Doors since 1902.
Get the Agent to Explode during the Tunnel. Twice.