Portal – Hall of Science Map. You certainly know the Portals games, developed by Valve, and the Portalgun mod, created by iChun. This is a map with the totality of the first Portal game and, eventually, some new test chambers. Portal Map Screenshots: 18 Tests chambers from the game. 13 additional rooms. The “Second part” … Continue reading Portal – Hall of Science Map (26.1.2, 1.20.1)