I've looked at several videos of Portal 2 and am interested in buying it. The problem is that I've never played the original Portal, the first game of the series.

Should I play Portal before playing Portal 2?

  • Will I understand Portal 2's story more if I play the first game?
  • Are there concepts explained in the first game that aren't repeated in the second one, which would make me miss some little details?
  • 44
    +It's only US$5 extra to buy a pack with Portal 1 & 2!
    – elwyn
    Commented Apr 26, 2011 at 9:42
  • 1
    @elewyn Really? Where did you look? Commented Apr 26, 2011 at 15:00
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    @Justin: store.steampowered.com/app/620/?snr=1_4_4__100. Portal 2: $49.99 (USD). Portal Bundle: $54.98 (USD). Difference: $4.99 (USD). Pretty much $5.00 (USD) extra. ;) Commented Apr 26, 2011 at 17:54
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    I should have ordered from Steam, but I ordered from GameStop. I was plying Portal 2 wishing I could relive Portal 1. Commented Apr 26, 2011 at 17:57
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    I was quite happy to find it for free on Steam as I already had a Source game in my library. And as it also uses the Source Engine, it comes for free! :)
    – LudoMC
    Commented Apr 26, 2011 at 18:13

10 Answers 10


I think it's definitely worthwhile playing Portal first. I just started Portal 2 and would probably have been a bit lost without having played Portal first. There is almost no introduction to how the portal-gun and other stuff works in Portal 2 and there are a lot of references to the previous game.

It makes Portal 2 an even better game if you have played Portal.

  • 33
    +1 for the recommendation. You can't appreciate the pure hatred in the antagonist's remarks without playing the first. Commented Apr 26, 2011 at 8:50
  • 4
    This is a good response, and should be the accepted answer. The enjoyment of Portal2 is significantly improved with a play through of Portal.
    – Neon1024
    Commented Apr 26, 2011 at 9:56
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    Sorry, you're wrong. Portal 2 actually does a much better job of explaining the Portal Gun to new users than Portal 1 did. (I just re-played Portal 1 and after 2, and it's pretty poor in comparison. Plus you can hear Valve discuss how they improved the explanation in 2 in the developer's commentary.) Commented Apr 26, 2011 at 12:03
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    No, GLaDOS doesn't explain anything! The game mechanics themselves are taught by the user experimenting (remember the room with the moving Portal Gun?). Portal 2 does a much better job of explaining the mechanics. Commented Apr 26, 2011 at 12:28
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    I haven't played Portal 1 and had no trouble following the story line. It becomes quite clear what happened in the first part from what GLaDOS and Wheatley tell you.
    – magnattic
    Commented Apr 26, 2011 at 18:25

Portal 2 starts out fairly simply. Thus, from a gameplay standpoint, you won't have a hard time figuring out the mechanics of the game.

However, Portal 2 continues the storyline from the first game. There are also many elements in the game that you wouldn't understand/enjoy/love not having played the first game.

Playing Portal 2 without playing Portal can be likened to hearing the punchline, but not the joke.

Furthermore, if you EVER wish to play the first one, it would be ruined by having played the second one first.

  • 1
    IF, haha, you mean WHEN right? =D
    – Millard
    Commented Jun 16, 2021 at 23:29

Certainly a lot of the story elements will make more sense if you have played the first game, however I don't think it's absolutely necessary.

As for gameplay instructions and explaining how things work, yeah, you'd be much better off playing the first one first. Portal 2 drops you much more suddenly into the thick of things than Portal 1 did.

Those reasons aside, you should get Portal 1 simply because it's a kickass game!

  • 1
    And also cheap!
    – Kzqai
    Commented Apr 26, 2011 at 15:55
  • Even free! (if you already had a Steam game based on the Source engine)
    – LudoMC
    Commented Apr 26, 2011 at 22:23

Gameplay: Portal 2 can stand on its own. The first levels of Portal are also in Portal 2, letting people in on the basics. The later levels explore techniques and mechanics that are not present in Portal 2. Thus, playing Portal and especially mods like Portal: Prelude can give you false expectations for Portal 2.

Plot: this is not really true. Wheatley vaguely hints about what happened in Portal, then GLaDOS "gives it away".

So yes, play Portal before Portal 2, if you can.


As already suggested and accepted play the original Portal before starting the sequel is preparatory to have even a greater experience with Portal 2.

But suppose that you are so excited because of all wonderful reviews and nice comments you read around, and you really want to start immediately Portal 2, while the game is installing you can spend 15 minutes doing the following things:


You should definitely play the first game.

Not only because it's important to understand the story, but also because its just as excellent a game as Portal 2 is.


You can play Portal 2 without having played Portal first as every game mechanic is presented in Portal 2. However, you'll spoil the story of the first one doing that as it is a direct sequel (and there are many references to the first one, in the story and in some puzzle).

I think it would be a good idea to play the first one, because once you have finished playing Portal 2, you'll want to play it.


Any other things you might think of.

There are other reasons for playing Portal 1 before 2 that are not really detailed in the other answers.

  1. Portal 1 is a very short game - short enough to even consider starting & finishing Portal 1 in the same day before making a start on Portal 2
  2. The majority of Portal 1 is arguably a tutorial (made of numerous test chambers) - learning the game mechanics through these levels will shorten the head scratching that may pop up in Portal 2
  3. Portal 1 was well received because it was something different - you will appreciate it more having not experienced Portal 2 beforehand

And as others have stated, Portal 2 is a sequel that follows on from events in Portal 1, but in a more story-driven manner. There is a sense that you are being thrown into the game ready to handle the faster pace of Portal 2 because you went through Portal 1.


I happened to play Portal 2 before I played Portal 1 (mostly because Steam had 2 on sale at the time).

While playing 2, I didn't really feel that lost. Most of the mechanics shared between the two games (portals, buttons, cubes, moving platforms, turrets) have similar “tutorial” levels. Story-wise, the two main robot characters in 2 will tell you how 1 ended. Which would be a disadvantage if you don't like spoilers.

There were a few references that didn't make sense until after I played 1. Most notably, the appearance of a particular prop in 2's final cutscene.

Having thoroughly enjoyed 2, I went on to play 1. But it was kind of a letdown, having only about a quarter of the play time, and missing the lovable characters of Wheatley and Cave Johnson. I probably would have appreciated 1 more if I hadn't played 2 beforehand.


If you want the full experience of portal 2, I recommend to play the Half-Life -series first and than the Portal-series. Because there are things in the story of Portal that refer to the story of Half-Life.

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