Sit and meditate with another player for more than 20 seconds.

Complete story mission 2.

Destroy 30 objects in 60 seconds.

Escort Heather Swanson to Arnett's apartment without damaging your vehicle.

Place a cube on a button without touching the cube

Reunite with GLaDOS

Use the jukebox to change the music.

Push 5 blocks at once. (Golden Playhouse)

Submit Ocelot

Collect every type of fruit

Use the Fake Death pill

CQC Slam a guard and knock him out