initiative perfect
Beat all of "initiative" without hitting a wall.
🎮
Duet
Grindstone
Compete in the Daily Grind 7 times
transcendence perfect
Beat all of "transcendence" without hitting a wall.
🎮
Duet
resilience perfect
Beat all of "resilience" without hitting a wall.
🎮
Duet
quickening perfect
Beat all of "quickening" without hitting a wall.
🎮
Duet
identity perfect
Beat all of "identity" without hitting a wall.
🎮
Duet
Team Building
Complete all test chambers in the Team Building co-op course
🎮
Portal 2
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course
🎮
Portal 2
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course
🎮
Portal 2
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course
🎮
Portal 2
You Saved Science
Complete all test chambers in all courses of co-op
🎮
Portal 2
Gesticul-8
Perform all 8 gestures of your own volition in co-op
🎮
Portal 2
Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op
🎮
Portal 2
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them
🎮
Portal 2
Party of Three
Find the hidden companion cube in co-op test chamber
🎮
Portal 2
Narbacular Drop
Place a portal under your co-op partner while they are gesturing
🎮
Portal 2
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before
🎮
Portal 2
