Portal ™ is a new single player game from Valve. Set in the mysterious Aperture Science Laboratories, Portal has been called one of the most innovative new games on the Downloadable Content For This Game. Free. Portal Soundtrack. The Portal 1 Play Free Online, Walkthrough, Hints, Tips, Cheats, Solution, Help, Guide, Tricks, Answers, Codes, Passwords, Faq, Reviews, Video Walkthrough. Me and my brother playing my custom portal test chamber in multiplayer Map by +Thomas Rice no i play.