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If I play, for example, Plant vs Zombies or Toki Tori on Steam when I am offline, can I get achievements? Are these re-synchronized when Steam returns online?

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up vote 12 down vote accepted

I thought it was. Now that I've tried it, it seems that Steam doesn't expose the APIs needed to unlock achievements to games when it's in offline mode. So no, you can't unlock achievements in offline mode.

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Not fully sure about that, though. I remember playing Portal offline, and never got the achievements for it. But it was more than a year ago, it may have changed. – Gnoupi Jul 14 '10 at 11:49
You're right. Answer edited. – user56 Jul 14 '10 at 12:15
VAC has nothing to do with achievements. In fact, they have nothing in place to prevent 'cheating' achievements. – user56 Jul 14 '10 at 16:20
@shaderach - No, in this context offline is 'without an internet connection'. If you have no internet connection and you play CS:S with bots only you will not get achievements. – user56 Sep 10 '10 at 9:09
This info is now outdated, see the other answer. – kotekzot Aug 10 '12 at 11:44

Since recently, you do get achievements in Offline mode, if you have opened the game in Online mode before, or viewed its details.


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Well - it's some years later and.. it still seems to depend on the game the most. I play recently almost exclusively offline and connect gaming machine to Internet once every few weeks. E.g. in 'Botanicula' - with almost all achievements gathered on the way - I have only the second 1/2 of them on Steam (some of the missing ones being impossible to miss). :) 'Bejeweled 3' seems to sync all achievements perfectly (with their progress also!) on next online session. For 'Plants vs. Zombies' I have only 1 ('Home Lawn Security') on Steam while I have around 3/5 of them in game itself.

There are many threads around the web regarding those games AND achievements, but the common conclusion is: Some games just don't sync them properly and that's it. :(

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