- theportalwiki.com wiki/Portal_2on plot elements within Portal 2, specifically that for part of the game, GLaDOS's personality module is run off a potato battery.
- half-life.fandom.com wiki/Portal_2As mentioned in The Final Hours of Portal 2, Portal 2 stemmed from F-STOP, which originally was a prequel to the first game set during Cave Johnson's era.
- kurulumtv.com portal-2-indir/Portal 2 Full İndir – Portal 2, 70’in üzerinde ödül alan ve tutkulu takipçilere sahip olan Portal’ın yenilikçi oynanışından, hikayesinden, müziğinden güç alıyor.
- steamunlocked.net 41-portal-2-free-v7-download/The single-player portion of Portal 2 introduces a cast of dynamic new characters, a host of fresh puzzle elements, and a much larger set of devious test chambers.
- Adhesion gel, Schrödinger cubes, the paint gun and colored lasers are just a few of the new testing elements available in Portal 2: Community Edition.
- tamindir.com indir/portal-2/Valve'in başarılı oyunlarından bir tanesi olan ve ilk kez 2011 yılında lansmana çıkan Portal 2 günümüze kadar popülerliğini kaybetmeden gelmeyi başardı.
- gametrex.com portal-2-free-download/Once Portal 2 has finished downloading, extract the file using a software such as WinRAR. Run the game setup inside the extracted folder and install the game.
- tr.wikipedia.org Portal 2Portal’daki olaylar birinci ve ikinci Half-Life oyunları arasında gerçekleşirken, Portal 2’nin çoğu Portal ve Half-Life 2’deki olaylardan sonra geçmektedir.[2].
- repack-games.com portal-2-free-download-v/Success will require them to not just act cooperatively , Portal 2 Free Download PC Game Repack-Games.com. but to think cooperatively.
- developer.valvesoftware.com wiki/Portal_2The single-player portion of Portal 2 introduces a cast of dynamic new characters, a host of fresh puzzle elements, and a much larger set of devious test chambers.