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What are the precise differences between “playable” and “optimal”?

The Starcraft 2 installer lets you play the game even before it's completed installing.

  • How is this possible?
  • What content is missing if I play before it's installed?
  • What is the incentive to even let it finish installing if I can already play the game in advance?
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marked as duplicate by Resorath, kalina, fredley, Tharius, MBraedley Jan 2 '13 at 14:36

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

How is this possible is outside our scope. The other two questions, though, should be alright. – Frank Jan 1 '13 at 20:58
I'm not interested in the technical implementation, I'm interested to know how it affects gameplay. And if the answer is "it doesn't", then what's the point of letting it finish? And all the remaining chain of related questions. – tenfour Jan 1 '13 at 21:29
I've pondered this question many times... I was actually about to post a question on it. :) – Nick122 Jan 2 '13 at 2:10

Although not directly relevant to your Star Craft II question, see this similar question regarding the Diablo III client:

What are the precise differences between "playable" and "optimal"?

Blizzard uses similar technologies that support "Playable" gameplay across their different games (Diablo, StarCraft, and World of Warcraft); at least conceptually, the answer would be the same for all of those games.

As far as was what exact content is missing, incomplete, or otherwise unplayable, that would depend on the nature of the update and what content Blizzard deemed superfluous with respect to "core content" (content not required to be installed before the game is considered "Playable"). I can't say that I've ever played a Blizzard game in "Playable mode" and encountered an issue that I could directly attribute to an incomplete install or patch.

Blizzard isn't too specific on what exactly a "hiccup" is either:

Please keep in mind that if the progress bar isn’t full when you begin playing, then that means that the patch hasn't been fully applied and there may be some gameplay hiccups. That’s normal, and you can wait for the progress bar to fill completely if you’re concerned about performance...


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