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https://steamcommunity.com/app/400/discussions/0/648814844396353223/
https://www.ign.com/wikis/portal/Walkthrough
http://www.pouetpu-games.com/index.php?section=4
https://en.wikipedia.org/wiki/Portal_(series)
https://developer.valvesoftware.com/wiki/Portal_Level_Creation
http://decodeingress.me/ingress-manual/ingress-portals/
https://ingress.fandom.com/wiki/Portal
https://gamedevelopment.tutsplus.com/tutorials/portal-2-level-design-c...
https://enterprise.arcgis.com/en/portal/10.5/administer/windows/roles....
https://enterprise.arcgis.com/en/portal/latest/administer/linux/roles....
http://www.portalwalkthroughs.com/
https://www.rockpapershotgun.com/2013/09/20/untold-riches-an-analysis-...
http://crawl.chaosforge.org/Portal
http://www.thinkwithportals.com/
Co-Authored By:
2020-10-25