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A silent friendship: adventures in Portal 2's co-op mode
https://arstechnica.com/gaming/2011/04/a-silent-friendship-adventures-in-portal-2s-co-op-mode/#:~:text=There%20have%20been%20many%20complaints,at%20least%20five%20hours%20long.
There have been many complaints about the length of Portal 2 but, like many of the complaints leveled at the game, they're mostly unfounded. The single-player game can take six to 10 hours to play, and the co-op campaign is at least five hours long.Apr 21, 2011
How long is Portal 2? – HowLongToBeat.com
https://howlongtobeat.com/game?id=7231
Submit Your Time ; Main Story. 8½ Hours ; Main + Extras. 13½ Hours ; Completionist. 21 Hours ; All Styles. 10½ Hours.
How long did it take you to finish Portal 2? : r/gaming – Reddit
https://www.reddit.com/r/gaming/comments/gun5t/how_long_did_it_take_you_to_finish_portal_2/
If you’re like me and you like to look at small details and take your time, then it’ll probably last you somewhere between 8-12 hours. Also even after you …
How long did it take you to finish portal 2 – Steam Community
https://steamcommunity.com/app/620/discussions/0/451848854997403702/
12 hours the first playthrough I think, but I have played the game many times and obviosly it took less time than the first time! #2. Duion.
How is co-op and how long is it? – Portal 2 – GameFAQs
https://gamefaqs.gamespot.com/boards/991073-portal-2/58866562
the campaign should last just over 10 hours. … I just finished it in 5 hours and according to a lot of forum-goers that’s a rather slow time.
Average Play Times for Portal 2 (single player campaign)
http://www.gamelengths.com/games/playtimes/Portal+2+(single+player+campaign)/
Portal 2 (single player campaign). Time to finish based on 170 play times. Game Info. Platforms …
Portal 2 – Wikipedia
https://en.wikipedia.org/wiki/Portal_2
Gameplay
Portal 2 on Steam
https://store.steampowered.com/app/620/Portal_2/
Overwhelmingly Positive (98% of 244,713) All Time … Portal 2 draws from the award-winning formula of innovative gameplay, story, and music that earned the …
How long did it take you to beat Portal 1? – Steamgifts
https://www.steamgifts.com/discussion/UN6Dk/how-long-did-it-take-you-to-beat-portal-1
It says 2 hours on my Steam, but I’ve played the game before I bought it from the bundle. First time must’ve been like 3.5 to 4 hours. Epic …
Portal 2 – How long is
https://howlongis.io/app/620/Portal+2
The average time played for Portal 2 is 18 ½ hours. Half of the players have played for more than 18 ½ hours. 90% of the players, played this game for 6 …