Vertically Unchallenged Reward: 15 Points Objective: Master the Repulsion Gel
Stranger Than Friction Reward: 15 Points Objective: Master the Propulsion Gel
Professor Portal Reward: 75 Points Objective: After completing co-op, complete Calibration Course online with a friend who hasn’t played before
Air Show Reward: 20 Points Objective: Perform 2 aerial gestures before touching the ground in co-op
Portal Conservation Society Reward: 20 Points Objective: Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
Empty Gesture Reward: 25 Points Objective: Drop your co-op partner in goo while they are gesturing by removing the bridge under them
Party of Three Reward: 25 Points Objective: Find the hidden companion cube in co-op test chamber
Narbacular Drop Reward: 25 Points Objective: Place a portal under your co-op partner while they are gesturing
Asking for Trouble Reward: 10 Points Objective: Taunt GLaDOS in front of a camera in each of the five co-op courses
Rock Portal Scissors Reward: 20 Points Objective: Win 3 co-op games of rock-paper-scissors in a row
Friends List With Benefits Reward: 50 Points Objective: While playing co-op, hug 3 different people on your friends list
Four Ring Circus Reward: 25 Points Objective: Enter 4 different portals without touching the ground in co-op
Triple Crown Reward: 15 Points Objective: Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
Still Alive Reward: 15 Points Objective: Complete Course 4 with neither you nor your co-op partner dying
Can't Touch This Reward: 10 Points Objective: Dance in front of a turret blocked by a hard light bridge in co-op
Smash TV Reward: 75 Points Objective: Break 11 test chamber monitors
High Five Reward: 5 Points Objective: Celebrate your cooperative calibration success
Team Building Reward: 10 Points Objective: Complete all test chambers in the Team Building co-op course
Door Prize Reward: 20 Points Objective: Examine all the vitrified test chamber doors
Portrait of a Lady Reward: 10 Points Objective: Find a hidden portrait
You Made Your Point Reward: 10 Points Objective: Refuse to solve the first test in Chapter 8
You Saved Science Reward: 100 Points Objective: Complete all test chambers in all courses of co-op
Iron Grip Reward: 20 Points Objective: Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
Gesticul-8 Reward: 15 Points Objective: Perform all 8 gestures of your own volition in co-op
Confidence Building Reward: 10 Points Objective: Complete all test chambers in the Mass and Velocity co-op course
Bridge Building Reward: 15 Points Objective: Complete all test chambers in the Hard-Light Surfaces co-op course
Obstacle Building Reward: 15 Points Objective: Complete all test chambers in the Excursion Funnels co-op course