Question 1

How many copies has Portal 2 sold?

Accepted Answer

over 4 million copies (as of May 2012; Source: Game Developer (Gamasutra)).

Question 2

How many hours does it take to beat Portal 2's main story?

Accepted Answer

9 hours (as of October 2026; Source: HowLongToBeat).

Question 3

How many hours does it take to 100% Portal 2?

Accepted Answer

23 hours (as of October 2026; Source: HowLongToBeat).

Question 4

What Metacritic score did Portal 2 get?

Accepted Answer

95/100 (as of October 2026; Source: Metacritic).

Question 5

How many people worked on Portal 2?

Accepted Answer

40 people (as of April 2011; Source: NPR).

Question 6

How big is Portal 2 on disk (GB)?

Accepted Answer

8 GB (as of October 2026; Source: Valve (Steam)).

Portal 2 in numbers

Other games

Metric	Number	Date	Source
Copies soldCopies sold across all platforms (PC and consoles) one year after release	over 4 million copies	May 2012	Game Developer (Gamasutra)
Peak concurrent players (Steam)	🔒 This number is in an upcoming daily mission. Play to find out.
Length (main story)Single-player main story (HowLongToBeat)	9 hours	October 2026	HowLongToBeat
Length (100%)100% completion (HowLongToBeat)	23 hours	October 2026	HowLongToBeat
Metacritic scoreMetascore, Xbox 360 version	95/100	October 2026	Metacritic
Team sizePortal 2 team members (Valve)	40 people	April 2011	NPR
Install sizeRequired disk space (PC, Steam)	8 GB	October 2026	Valve (Steam)