Where the challenge is: systems — knowing how it works.
How hard is Portal 2?
Where the challenge is: systems — knowing how it works. You get through it by working out what the game is actually doing and coming back with a better build or a better plan, not by faster hands.
Who actually finishes Portal 2
- Steam34%of everyone who owns it on Steam“Lunacy”about 46% of the ones who actually played it
Same game, three different crowds. Steam, PlayStation and Xbox each work these percentages out from their own players, so the numbers move around while the game stays exactly the same. A lower number doesn't mean it's harder on that platform.
Rarest achievements
Published rarity by platform.
Steam
Still AliveComplete Course 4 with neither you nor your co-op partner dying2.4%
Talent ShowNever lose a cube in Chamber 6 of the Mobility Gels co-op course2.6%
Portal Conservation SocietyComplete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements2.8%
Triple CrownSolve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each3.0%
Party of ThreeFind the hidden companion cube in co-op test chamber3.5%
Played Portal 2? See how many of these you've got.
- Which ones you've earned — and which you're missing
- Your rarest unlock, and where it ranks
- Your whole history for this game, on one timeline
- Steam, PlayStation, Xbox and Battle.net in one place
Free. Takes about a minute.
About Portal 2
The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!
How rarity is calculated
Each platform calculates rarity from its own player population. These percentages are shown side by side but are not a controlled comparison.
- Steam — Valve's published global unlock percentage across Steam owners of the game.
Percentages are shown exactly as each platform publishes them. Pyroblast does not recalculate them and does not mix player populations together. Data updated .