The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!
User reviews: Overwhelmingly Positive (44,478 reviews)
Release Date: Apr 18, 2011

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Includes 2 items: Portal, Portal 2

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Includes 24 items: Counter-Strike: Global Offensive, Portal 2, Left 4 Dead 2, Left 4 Dead, Portal, Team Fortress 2, Team Fortress Classic, Counter-Strike: Source, Counter-Strike, Counter-Strike: Condition Zero, Day of Defeat, Day of Defeat: Source, Half-Life 2, Half-Life 2: Deathmatch, Half-Life 2: Lost Coast, Half-Life 2: Episode One, Half-Life 2: Episode Two, Half-Life, Half-Life: Blue Shift, Half-Life: Opposing Force, Half-Life Deathmatch: Source, Half-Life: Source, Ricochet, Deathmatch Classic

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Downloadable Content For This Game

 

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.

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
509 of 538 people (95%) found this review helpful
18 people found this review funny
3,333.3 hrs on record
Posted: December 26, 2014
Don't have much experience in this game, but what little time I did spend playing was great fun. One of my top 5 games of all time easily 11/10
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562 of 622 people (90%) found this review helpful
5 people found this review funny
11.2 hrs on record
Posted: October 24, 2014
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 Funny
823 of 957 people (86%) found this review helpful
1 person found this review funny
121.8 hrs on record
Posted: November 15, 2014
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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860 of 1,015 people (85%) found this review helpful
6 people found this review funny
9.7 hrs on record
Posted: November 14, 2014
BEFORE YOU BUY THIS GAME

░▎Note that after playing this game your brain WILL explode (with knowledge)
░▎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 Funny
226 of 248 people (91%) found this review helpful
2 people found this review funny
10.5 hrs on record
Posted: December 28, 2014
-
Click for Gameplay Trailer
-
Graphics:
+ cool portals, gels and light bridges
+ varied test chambers
+ harmonious style
- rather simple environments
- few details

Atmosphere:
+ engaging game world
+ exciting, funny and mysterious
- sacrificed in places atmosphere in favor of gags

Sound:
+ subtle atmospheric music and effects
+ damn good credits
+ many witty comments, optional
- only Wheatley can be annoying

Balance:
+ beginner-friendly start-puzzles
+ gradually increase in difficulty
+ level design is tricky, but fair
- help is missing

Level Design:
+ imaginative and challenging situations
+ portals highly versatile
- next exit sometimes hiding something

Physics:
+ portal physics compelling and sophisticated
+ ghange physics properties of objects with color gels
+ gravity credible and realistic

Weapons & Extras:
+ portal gun's still a lot of fun
+ numerous successful new puzzle elements

Story:
+ contains some nice twisting tale
+ just as exciting as touching the end
- sometimes slightly turned

Game Size:
+ solo playtime around 12 hours
+ co-op levels
+ more varied than its predecessor
+ achievements and comment mode
- no incentive to play through multiple times

Multiplayer: very good 6 / 6
+ multiplayer playtime around 12 hours
+ enjoyable brooding cooperation with droll droid couple

All the puzzles and tinkering is held together by a divided into ten chapters story that offers a good rhythm game. While there is no shortage of puzzle test chambers, but these interrupts Portal 2 again and again by action events and even a trip outside the sterile laboratories. The portal odyssey begins when we are suddenly awakened from a deep sleep Stasis - with a few centuries late.

By far the most brilliant innovation of Portal 2, three colored gels that were developed in the experimental kitchens of Aperture Science. The Goo we may not take, but there are plenty of levels in which the gel drops of pipes.
By portals passing them on to all sorts of corners and ends where they color a surface permanently and thereby change their physical properties. The blue Repulsion Gel makes objects leaps and bounds, the red Propulsion Gel provides ice-like smoothness and the white Conversion Gel allows the setting of portals. Of course, the physics comes into play; where the gas flowing through a portal gel flows just depends on the angle of incidence. This game element allows some captivating puzzles, and on top of that makes the play with the color irrational lot of fun.

On the other hand something of a challenge mode is missing to have after a successful playing an incentive to play the puzzle again. There are as thick consolation to the new co-op mode that contains a good amount of additional puzzle rooms that have been specifically designed for the teamwork of two players.
The co-op mode of Portal 2 offers 40 additional levels that have been specifically designed for two players take on the role of cute droid Atlas and P-body. In a central area you get together with his partner, then - accompanied by usual cynical comments GLaDOS - to enter a six test sections. If you play up to the exit by which each next (more difficult) field is enabled.

Humor and atmosphere were fun trump cards of the portal. The sequel is more extensive and varied, but sometimes just louder and not necessarily harmonious.

A must program for fans of its predecessor !! - and generally just about any player looking for a smart, fun and original challenge. If you step by step to finish a level of gameplay crackles constant, to the considerable comfort when eventual mastery. The gels are a hit, the other new puzzle elements also enrich the portal gameplay. Even though I have sometimes pondered strong and sometimes cursed - the level design is fair and the motivation high until the final.

Score: 92 / 100
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Was this review helpful? Yes No Funny
179 of 195 people (92%) found this review helpful
27.2 hrs on record
Posted: November 4, 2014
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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244 of 285 people (86%) found this review helpful
5 people found this review funny
53.1 hrs on record
Posted: October 28, 2014
10/10 - Would buy again.

Oh wait, I've already bought it three times.
Was this review helpful? Yes No Funny
300 of 363 people (83%) found this review helpful
2 people found this review funny
20.1 hrs on record
Posted: October 19, 2014
It's a good game. Has important lessons about lemons. 10/10
Was this review helpful? Yes No Funny
547 of 743 people (74%) found this review helpful
6 people found this review funny
28.3 hrs on record
Posted: November 24, 2014
Chell has 5 letters in it.
Chell has been in 2 games.
5-2=3
Illuminati has 3 sides.
GLaDOS has 1 eye.
Illuminati has 1 eye.
Portal=Illuminati
Illuminati=Portal 3
HALF-LIFE 3 CONFIRMED!
Thanks for confirming, Portal.
Was this review helpful? Yes No Funny
310 of 422 people (73%) found this review helpful
2 people found this review funny
23.1 hrs on record
Posted: October 26, 2014
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 Funny
75 of 82 people (91%) found this review helpful
1 person found this review funny
15.3 hrs on record
Posted: December 3, 2014
It goes without saying this is exceptionally one of the greatest FPS' games that doesn't require real bullets, targets and most other stereotypical mechanics that are found in that specific genre to make such a fantastic game. This game demonstrates what it always had shown in it's prequel; ingenuity and intellectual perfection.

Now imagine all those unanswered questions that linger within the first game, and how this sequel answers all those said questions with the utmost scientific explanations and entertainment from this one. From what I could honestly tell you, this game took the first games mechanics, and widened the story much more bigger and fluently better. Definitely worthy of Game of the Year 2011.

Much like my other short reviews on other peculiar Valve titles, where some happen to be other sequels, this game doesn't even need to be reviewed more in-depth due to the high magnitude and complete satisfactory found within this wonderful game. From what I could honestly tell you, this game is blessed with the voice acting of the high and mighty, Stephen Merchant, along with 2-player modes that'll leave the fun completely endless with a friend. I've said my word and it's a compulsed recommendation from me.
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69 of 80 people (86%) found this review helpful
47.4 hrs on record
Posted: November 9, 2014
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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70 of 83 people (84%) found this review helpful
1 person found this review funny
40.1 hrs on record
Posted: October 31, 2014
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!!
Was this review helpful? Yes No Funny
196 of 278 people (71%) found this review helpful
1 person found this review funny
16.5 hrs on record
Posted: November 5, 2014
I can't complain about a game that Gaben made.
Was this review helpful? Yes No Funny
169 of 242 people (70%) found this review helpful
1 person found this review funny
21.7 hrs on record
Posted: October 29, 2014
Yes
Was this review helpful? Yes No Funny
44 of 47 people (94%) found this review helpful
1 person found this review funny
37.6 hrs on record
Posted: January 2
One of the best fps/coop games I've ever played.
Hours of fun playing & with friends, the coop just gets better, with lots of challenging puzzles.
A saga with an excelent wit & great background story.

I would totally recommend it.

10/10
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72 of 91 people (79%) found this review helpful
9.4 hrs on record
Posted: October 17, 2014
This game has enough talent and genious put in it, that you can put together a dozen AAA title just from scraps. You have to finish both games... just to hear the credit song <3

I'm a potato! :D
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1,193 of 1,874 people (64%) found this review helpful
1 person found this review funny
11.6 hrs on record
Posted: December 28, 2014
this game is literally THE HIGHEST RATED GAME ON STEAM. Why the hell are you looking at negative reviews? Scroll up and click add to cart. Right now. DO IT!
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34 of 39 people (87%) found this review helpful
3 people found this review funny
25.2 hrs on record
Posted: December 30, 2014
DO NOT PRESS THE BUTTON!
PRESS IT!
DO NOT PRESS IT!
PRESS IT!
DO NOT PRESS IT!

10/10 would press the button again
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40 of 49 people (82%) found this review helpful
2 people found this review funny
38.5 hrs on record
Posted: November 15, 2014
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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