Portal 2

Survive the manual override

74.1% of players

Reunite with GLaDOS

64.8% of players

Complete the first Thermal Discouragement Beam test

62.7% of players

Celebrate your cooperative calibration success

58.6% of players

Complete the first Hard Light Bridge test

53.3% of players

Complete all test chambers in the Team Building co-op course

49.4% of players

Make a break for it

46.5% of players

Press the button!

45.5% of players

Master the Repulsion Gel

42.9% of players

Carry science forward

41.0% of players

Complete all test chambers in the Mass and Velocity co-op course

40.9% of players

Master the Propulsion Gel

39.4% of players

Complete the first Conversion Gel test

38.3% of players

Do the same test twice

37.0% of players

Master the Excursion Funnel

35.1% of players

Stand in a defective turret detector

34.7% of players

This is that part

34.4% of players

That just happened

34.1% of players

Perform 2 aerial gestures before touching the ground in co-op

33.3% of players

Complete all test chambers in the Hard-Light Surfaces co-op course

32.0% of players

Save a turret from redemption

31.1% of players

Place a cube on a button without touching the cube

28.9% of players

Take GLaDOS' escape advice

28.4% of players

Perform all 8 gestures of your own volition in co-op

27.1% of players

Complete all test chambers in the Excursion Funnels co-op course

26.3% of players

Break the rules in Test Chamber 07

24.4% of players

Complete all test chambers in all courses of co-op

21.2% of players

Find a hidden portrait

11.6% of players

Discover the missing experiment

10.7% of players

Dance in front of a turret blocked by a hard light bridge in co-op

9.8% of players

Win 3 co-op games of rock-paper-scissors in a row

9.8% of players

Taunt GLaDOS in front of a camera in each of the five co-op courses

8.9% of players

Use an Aerial Faith Plate to launch a turret

8.7% of players

Show that pit who's boss

7.9% of players

Examine all the vitrified test chamber doors

7.2% of players

Catch a blue-painted box before it touches the ground

6.9% of players

Enter 4 different portals without touching the ground in co-op

6.8% of players

Refuse to solve the first test in Chapter 8

6.6% of players

After completing co-op, complete Calibration Course online with a friend who hasn’t played before

5.9% of players

Place a portal under your co-op partner while they are gesturing

5.8% of players

Find the hidden signal in one of the Rat Man's dens

5.4% of players

Drop your co-op partner in goo while they are gesturing by removing the bridge under them

4.6% of players

While playing co-op, hug 3 different people on your friends list

4.5% of players

Complete Test Chamber 10 in 70 seconds

4.0% of players

Break 11 test chamber monitors

3.7% of players

Never lose a cube in Chamber 6 of the Mass and Velocity co-op course

3.6% of players

Find the hidden companion cube in co-op test chamber

3.6% of players

Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each

3.0% of players

Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements

2.8% of players

Never lose a cube in Chamber 6 of the Mobility Gels co-op course

2.7% of players

Complete Course 4 with neither you nor your co-op partner dying

2.4% of players