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Game overview
The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!
GeForce NOW
Available via Steam
Controller
Full controller support
Time to beat
4.1h story
10.4h with extras
27.1h to complete
Based on 35 submissions · IGDB
Ratings
IGDB users: 91/100 (4499 ratings)
Critics: 92/100 (9 ratings)
Singleplayer: Yes
Multiplayer: Yes
Modes: Single player · Multiplayer · Co-operative · Split screen
Suggestions from IGDB. Games already synced here open on Nextplay.
Game achievements
51 achievements listed · connect Steam to track unlocks
Complete Course 4 with neither you nor your co-op partner dying
Never lose a cube in Chamber 6 of the Mobility Gels co-op course
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
Find the hidden companion cube in co-op test chamber
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
Break 11 test chamber monitors
Complete Test Chamber 10 in 70 seconds
While playing co-op, hug 3 different people on your friends list
Drop your co-op partner in goo while they are gesturing by removing the bridge under them
Find the hidden signal in one of the Rat Man's dens
Place a portal under your co-op partner while they are gesturing
After completing co-op, complete Calibration Course online with a friend who hasn’t played before
Refuse to solve the first test in Chapter 8
Enter 4 different portals without touching the ground in co-op
Catch a blue-painted box before it touches the ground
Examine all the vitrified test chamber doors
Show that pit who's boss
Use an Aerial Faith Plate to launch a turret
Taunt GLaDOS in front of a camera in each of the five co-op courses
Dance in front of a turret blocked by a hard light bridge in co-op
Win 3 co-op games of rock-paper-scissors in a row
Discover the missing experiment
Find a hidden portrait
Complete all test chambers in all courses of co-op
Break the rules in Test Chamber 07
Complete all test chambers in the Excursion Funnels co-op course
Perform all 8 gestures of your own volition in co-op
Take GLaDOS' escape advice
Place a cube on a button without touching the cube
Save a turret from redemption
Complete all test chambers in the Hard-Light Surfaces co-op course
Perform 2 aerial gestures before touching the ground in co-op
That just happened
This is that part
Stand in a defective turret detector
Master the Excursion Funnel
Do the same test twice
Complete the first Conversion Gel test
Master the Propulsion Gel
Complete all test chambers in the Mass and Velocity co-op course
Carry science forward
Master the Repulsion Gel
Press the button!
Make a break for it
Complete all test chambers in the Team Building co-op course
Complete the first Hard Light Bridge test
Celebrate your cooperative calibration success
Complete the first Thermal Discouragement Beam test
Reunite with GLaDOS
Survive the manual override