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Portal free for PC/Mac Steam

Full list of Mac games inside.

Valve's charming triumph Portal is being given away for free to anybody who downloads Steam.

The deal runs until 24th May for PC and Mac.

Portal highlights Steam's new Steam Play functionality, whereby a game can be bought on either system but played across both.

Steam Play, in turn, heralds the arrival of a Mac version of Steam.

Every Wednesday "a new group of games highlighting an area of Steam functionality" will be released for Mac.

Available today are:

  • And Yet It Moves
  • Atlantis Sky Patrol
  • Bejeweled 2 Deluxe
  • Bob Came in Pieces
  • Bookworm Deluxe
  • Braid
  • Brainpipe
  • Chocolatier: Decadence by Design
  • Chuzzle Deluxe
  • City of Heroes: Architect Edition
  • Civilization IV: The Complete Edition
  • Cooking Dash
  • Diaper Dash
  • The Dig
  • Diner Dash: Hometown Hero
  • DinerTown Detective Agency
  • DinerTown Tycoon
  • Dream Chronicles: The Chosen Child
  • Escape Rosecliff Island
  • Fairway Solitaire
  • Fitness Dash
  • Football Manager 10
  • Galcon Fusion
  • Gemini Lost
  • Guns of Icarus
  • Hotel Dash Suite Success
  • Indiana Jones and the Fate of Atlantis
  • Indiana Jones and the Last Crusade
  • KrissX
  • Loom
  • Luxor
  • Luxor 3
  • Luxor: Mahjong
  • Machinarium
  • Mahjong Roadshow
  • Max and the Magic Marker
  • My Tribe
  • The Nightshift Code
  • Nightshift Legacy: The Jaguar's Eye
  • Parking Dash
  • Peggle Deluxe
  • Peggle Nights
  • Portal
  • Professor Fizzwizzle and the Molten Mystery
  • Quantz
  • Sam & Max: The Devil's Playhouse
  • Tales of Monkey Island Season 1
  • Toki Tori
  • Torchlight
  • Trijinx: A Kristine Kross Mystery
  • Unwell Mel
  • Valarie Porter and the Scarlett Scandal
  • Wandering Willows
  • Wedding Dash 2: Rings Around the World
  • World of Goo
  • Zenerchi
  • Zuma Deluxe