ActionAdventure
Portal 2
Hooks you almost right away
Gets good by 3h almost every game dips in hours 2–3
Fully opens up by 5h rated like by long-time players
Reach the ending 46% of players who started
Started playing 74% of owners
Steam reviews 99% positive of 468,632
What the data shows
- In the first 2 hours 1 in 15 reviews are negative (6%); after 10h it's 1 in 135 (1%).
- Fully opens up by hour 5.
- The opening is criticised less than in 95% of games we track.
- 46% of players who start reach the ending.
- The biggest drop-off is between “Undiscouraged” and “Bridge Over Troubling Water” (Complete the first Hard Light Bridge test): from 85% to 72% of starters.
- 74% of owners got the first achievement.
When it gets good
Share of positive reviews by how many hours the reviewer had played when writing the review.
before it gets good opening up fully opened up
Based on all 470,769 Steam reviews in every language. Median playtime in a sample of 298 reviews: 10.4h for positive, 11h for negative. Almost every game is rated lower in the first 2–3 hours: that window includes refunds and quick first impressions. What matters is how deep the dip is and how fast the game recovers.
Where players quit
Share of players who started the game and reached each story milestone. 100% is the most common achievement (74% of owners), so people who bought the game and never launched it don't count.
- Started playing 100%
- Wake Up Call Survive the manual override 100%
- You Monster Reunite with GLaDOS 87% −13
- Undiscouraged Complete the first Thermal Discouragement Beam test 85% −3
- Bridge Over Troubling Water Complete the first Hard Light Bridge test Most players quit here 72% −13
- SaBOTour Make a break for it 63% −9
- Stalemate Associate Press the button! 62% −1
- Vertically Unchallenged Master the Repulsion Gel 58% −4
- Tater Tote Carry science forward 55% −2
- Stranger Than Friction Master the Propulsion Gel 53% −2
- White Out Complete the first Conversion Gel test 52% −1
- Tunnel of Funnel Master the Excursion Funnel 47% −4
- The Part Where He Kills You This is that part 47% −1
- Lunacy That just happened 46%
story milestone ending biggest drop-off
Story milestones were labeled by AI from achievement names and descriptions; mistakes are possible.
All achievements (51)
story milestone ending side
- Wake Up Call Survive the manual override 100%
- You Monster Reunite with GLaDOS 87%
- Undiscouraged Complete the first Thermal Discouragement Beam test 85%
- High Five Celebrate your cooperative calibration success 79%
- Bridge Over Troubling Water Complete the first Hard Light Bridge test 72%
- Team Building Complete all test chambers in the Team Building co-op course 67%
- SaBOTour Make a break for it 63%
- Stalemate Associate Press the button! 62%
- Vertically Unchallenged Master the Repulsion Gel 58%
- Tater Tote Carry science forward 55%
- Confidence Building Complete all test chambers in the Mass and Velocity co-op course 55%
- Stranger Than Friction Master the Propulsion Gel 53%
- White Out Complete the first Conversion Gel test 52%
- Dual Pit Experiment Do the same test twice 50%
- Tunnel of Funnel Master the Excursion Funnel 47%
- Scanned Alone Stand in a defective turret detector 47%
- The Part Where He Kills You This is that part 47%
- Lunacy That just happened 46%
- Air Show Perform 2 aerial gestures before touching the ground in co-op 45%
- Bridge Building Complete all test chambers in the Hard-Light Surfaces co-op course 43%
- No Hard Feelings Save a turret from redemption 42%
- Drop Box Place a cube on a button without touching the cube 39%
- Good Listener Take GLaDOS' escape advice 38%
- Gesticul-8 Perform all 8 gestures of your own volition in co-op 37%
- Obstacle Building Complete all test chambers in the Excursion Funnels co-op course 36%
- Preservation of Mass Break the rules in Test Chamber 07 33%
- You Saved Science Complete all test chambers in all courses of co-op 29%
- Portrait of a Lady Find a hidden portrait 16%
- Ship Overboard Discover the missing experiment 15%
- Rock Portal Scissors Win 3 co-op games of rock-paper-scissors in a row 13%
- Can't Touch This Dance in front of a turret blocked by a hard light bridge in co-op 13%
- Asking for Trouble Taunt GLaDOS in front of a camera in each of the five co-op courses 12%
- Pturretdactyl Use an Aerial Faith Plate to launch a turret 12%
- Pit Boss Show that pit who's boss 11%
- Door Prize Examine all the vitrified test chamber doors 9.7%
- Schrodinger's Catch Catch a blue-painted box before it touches the ground 9.3%
- Four Ring Circus Enter 4 different portals without touching the ground in co-op 9.2%
- You Made Your Point Refuse to solve the first test in Chapter 8 8.8%
- Professor Portal After completing co-op, complete Calibration Course online with a friend who hasn’t played before 8.0%
- Narbacular Drop Place a portal under your co-op partner while they are gesturing 7.8%
- Final Transmission Find the hidden signal in one of the Rat Man's dens 7.3%
- Empty Gesture Drop your co-op partner in goo while they are gesturing by removing the bridge under them 6.2%
- Friends List With Benefits While playing co-op, hug 3 different people on your friends list 6.1%
- Overclocker Complete Test Chamber 10 in 70 seconds 5.4%
- Smash TV Break 11 test chamber monitors 5.0%
- Iron Grip Never lose a cube in Chamber 6 of the Mass and Velocity co-op course 4.9%
- Party of Three Find the hidden companion cube in co-op test chamber 4.7%
- Triple Crown Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each 4.1%
- Portal Conservation Society Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements 3.8%
- Talent Show Never lose a cube in Chamber 6 of the Mobility Gels co-op course 3.6%
- Still Alive Complete Course 4 with neither you nor your co-op partner dying 3.2%
Steam page Updated: 2026-10-20.