The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!
User reviews: Overwhelmingly Positive (35,066 reviews)
Release Date: Apr 18, 2011

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Recommended By Curators

"A challenging, hilarious, and mind-expanding puzzle experience for one or two—treasure your first time through."
Read the full review here.

Recent updates View all (26)

June 17

Portal 2 Update Released

We have updated the public release of Portal 2. This update contains all the changes from the recent beta. We would like to thank the community for the testing and suggestions that have been provided.

Changes:

  • Linux / SteamOS beta is now available
  • Steam controller support beta
  • Some translation updates
  • Fixed bugs with triple-monitor displays
  • Some other bug fixes

218 comments Read more

Steam Big Picture

Perpetual Testing Initiative




The "Perpetual Testing Initiative" has just been expanded to allow users to design co-op puzzles in Portal 2! This update also introduces a “Quick Play” feature, giving you quick access to the top-rated maps in various categories.

About This Game

Portal 2 draws from the award-winning formula of innovative gameplay, story, and music that earned the original Portal over 70 industry accolades and created a cult following.

The single-player portion of Portal 2 introduces a cast of dynamic new characters, a host of fresh puzzle elements, and a much larger set of devious test chambers. Players will explore never-before-seen areas of the Aperture Science Labs and be reunited with GLaDOS, the occasionally murderous computer companion who guided them through the original game.

The game’s two-player cooperative mode features its own entirely separate campaign with a unique story, test chambers, and two new player characters. This new mode forces players to reconsider everything they thought they knew about portals. Success will require them to not just act cooperatively, but to think cooperatively.

Product Features
  • Extensive single player: Featuring next generation gameplay and a wildly-engrossing story.
  • Complete two-person co-op: Multiplayer game featuring its own dedicated story, characters, and gameplay.
  • Advanced physics: Allows for the creation of a whole new range of interesting challenges, producing a much larger but not harder game.
  • Original music.
  • Massive sequel: The original Portal was named 2007's Game of the Year by over 30 publications worldwide.
  • Editing Tools: Portal 2 editing tools will be included.

System Requirements

Windows
Mac OS X
SteamOS + Linux
    Minimum:
    • OS: Windows 7 / Vista / XP
    • Processor: 3.0 GHz P4, Dual Core 2.0 (or higher) or AMD64X2 (or higher)
    • Memory: 2 GB RAM
    • Graphics: Video card must be 128 MB or more and with support for Pixel Shader 2.0b (ATI Radeon X800 or higher / NVIDIA GeForce 7600 or higher / Intel HD Graphics 2000 or higher).
    • DirectX: Version 9.0c
    • Hard Drive: 8 GB available space
    • Sound Card: DirectX 9.0c compatible
    Minimum:
    • OS: MAC OS X 10.6.7 or higher
    • Processor: Intel Core Duo Processor (2GHz or better)
    • Memory: 2 GB RAM
    • Graphics: ATI Radeon 2400 or higher / NVIDIA 8600M or higher / Intel HD Graphics 3000
    • Hard Drive: 8 GB available space
    Minimum:
    • OS: Ubuntu 12.04
    • Processor: Dual core from Intel or AMD at 2.8 GHz
    • Memory: 2 GB RAM
    • Graphics: nVidia GeForce 8600/9600GT, ATI/AMD Radeon HD2600/3600 (Graphic Drivers: nVidia 310, AMD 12.11), OpenGL 2.1
    • Hard Drive: 8 GB available space
    • Sound Card: OpenAL Compatible Sound Card
Helpful customer reviews
112 of 139 people (81%) found this review helpful
23.1 hrs on record
Posted: October 26
If you don't think this is the best game ever made, then you are nothing but a battery operated potato. By the way, no cake for those who rate this review down. Thank you for cooperating with Aperture Science in our time of testing. We hope to work with you again, that is if you feel fantastic and you're still alive.
Was this review helpful? Yes No
42 of 46 people (91%) found this review helpful
10.8 hrs on record
Posted: October 24
A woman with millions of fan theories about without ever speaking a word.
Intentionally designed to be stupid British cores.
Cruel women cores that are really good at singing.
Turrets with low self esteem.
A man that hates lemonade and sounds like J. Jonah Jameson from spiderman.
A potato that becomes your friend.

Combined together with the one of the most original gameplay ever.

10/10
Was this review helpful? Yes No
30 of 33 people (91%) found this review helpful
9.7 hrs on record
Posted: November 14
BEFORE YOU BUY THIS GAME

░▎Note that after playing this game you brain WILL explode
░▎Understand that your iq will increase
░▎May contain traces of Smooth Jazz
░▎Know that this game is awesome

Realise You have been warned...
Was this review helpful? Yes No
26 of 32 people (81%) found this review helpful
16.5 hrs on record
Posted: November 5
I can't complain about a game that Gaben made.
Was this review helpful? Yes No
22 of 29 people (76%) found this review helpful
21.7 hrs on record
Posted: October 29
Yes
Was this review helpful? Yes No
13 of 14 people (93%) found this review helpful
35.6 hrs on record
Posted: October 31
This is one of my most favourite games, it has an amazing and in depth storyline. The easter eggs like the borealis one are amazing. The plot twists aren't expected unlike most games where you know what will happen next. I'm a huge fan of greek mythology so when I found the oracle turret, my mind was blown! Cave Johnson was definetly a great character to introduce and to help us find out more about Aperture. THE ENDING, I absolutely loved the ending!!
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12 of 13 people (92%) found this review helpful
24.8 hrs on record
Posted: November 4
Take everything you love about Portal, then times it by five. This game has so many good aspects to it, it's hard to know where to start.

Sound? Witty dialouge, excellent voice work, a really cool soundtrack, and even something as simple as the sounds that the portal gun makes sound awesome!

Gameplay? Addictive.

Story? Really good. There are some parts to the story where I genuinely felt threatened and isolated.

Graphics? Nothing to complain about.

Although Portal 2 is undoubtedly one of the best games I've played in a while, there are two errors that I find with it:

#1 There are parts in the game where you have to use the "zoom" key to find almost unfindable portable surfaces. I thought this gameplay mechanic was rather silly and annoying.

#2 There are parts in the game where the events that happen don't make much sense, and you wonder why you have to do certain things or why you're in certain places.

Overall this game is one of the best games of our generation, and it's loads of fun. It's good aspects overwhelmingly outweighs my tiny nit-picked errors.
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14 of 17 people (82%) found this review helpful
119.1 hrs on record
Posted: November 15
Its little to say that this game is great.
But if Lord Gaben could count to 3 when it comes to making games, that'd be amazing.
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10 of 10 people (100%) found this review helpful
18.6 hrs on record
Posted: November 5
Throughout the single-player campaign I was constantly surprised how clever you could use this "simple" formula of two portals, and I admit, I had to look one or two times in a walkthrough - still, it's manageable for others like me who don't solve puzzles often and I really liked the feeling of accompishment after solving a puzzle and the reward of getting a new piece of the (mostly silly and amusing) story ("lemonades").

And the coop-campaign: I don't know any other game where you solve puzzles this way. Really, it's a lot of fun and shouldn't be missed out either (if you have someone to play with). It was also one of the first games on Steam with Splitscreen support. Although it's only for two-player, I'm pretty sure that it also would be funny with three or four people locally, when everyone's trying to figure a puzzle out together and the gamepads get handed around.

Lastly, there's the Workshop integration, and boy oh boy, are there a lot of puzzles. There are very complex ones with custom terrain and more simpler ones, created with the later released simpler editor, and there's an endless supply of new ones. I acctually recommend trying the simpler editor out yourself, just to see how hard it is to come up with puzzles.

Anyways, this is a game that everyone should play, even if it's not your genre. Because this is one of those defining games others will draw inspirations from and have to be measured by for years to come. Also, it won't get a sequel, because 3.
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11 of 12 people (92%) found this review helpful
44.0 hrs on record
Posted: November 9
10/10, all class. Easily in my top 3 games of all time, a genius game. The perplexing puzzles and thoughtful level design make this game so memorable. Sarcasm and Sardonic humor is sprinkled throughout. Never for one moment does any thing in this game seem like a lazy or poorly crafted addition. Everything works!
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12 of 14 people (86%) found this review helpful
8.0 hrs on record
Posted: November 8
No words can describe this masterpiece <3
Was this review helpful? Yes No
13 of 16 people (81%) found this review helpful
52.6 hrs on record
Posted: October 28
10/10 - Would buy again.

Oh wait, I've already bought it three times.
Was this review helpful? Yes No
10 of 12 people (83%) found this review helpful
302.8 hrs on record
Posted: October 31
GAME RESULTS: YOU ARE A MONSTER NOT TO PLAY THIS GAME
Was this review helpful? Yes No
10 of 13 people (77%) found this review helpful
14.0 hrs on record
Posted: October 24
This game has everything to make a good game. Funny characters with great dialoge and a great storyline. I laughed the whole way through. Plus with the great music, cake and lemons. It slips away from the science fiction theme and is aimed more toward using your head. It has found its place at Valve and also a place in my heart.
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6 of 6 people (100%) found this review helpful
69.5 hrs on record
Posted: November 13
Really fun and challenging, great multiplayer (I've beat it like three times) great story, and I like how its in the Half Life universe.

9/10
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4 of 4 people (100%) found this review helpful
8.9 hrs on record
Posted: November 3
Great puzzle game
Was this review helpful? Yes No
3 of 3 people (100%) found this review helpful
30.0 hrs on record
Posted: October 28
"I'm the man whose gonna burn your house down - with the lemons!"
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3 of 3 people (100%) found this review helpful
120.5 hrs on record
Posted: October 23
Portal 2 is one of the best game I've ever played.
Was this review helpful? Yes No
3 of 3 people (100%) found this review helpful
35.6 hrs on record
Posted: November 15
My partner and I taunted GLaDOS in front of the cameras, she got mad, and we were rewarded with an achievement. Shortly after, I told my partner to gesture and I killed him. Got an achievement for that too

16 portals / 10
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3 of 3 people (100%) found this review helpful
6.1 hrs on record
Posted: November 16
I cried after finishing this game, because i knew Gaben won't release third part. :cc
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