Owners of L4D2 get BOTH mac and PC game versions, no extra charge. L4D1 is just for windows at the moment, but mac version should be out by Halloween per the devs:
http://www.l4d.com/sacrifice/#mac_content
To buy a 4 pack you can NOT own the game you are buying the 4 pack for. If you already own it, steam won't let you buy the 4 pack.
If you buy the bundle and have a copy of L4D1 already, you will receive a giftable L4D1 game according to valve:
https://support.steampowered.com/...-TPJL-2656
(list of the only 5 possible cases where someone can get extra giftable copies if they already own certain games on steam)
Quote : Extra copies will only be issued as a special promotion in the following cases:Users who own "Left 4 Dead" and then go on to purchase "Left 4 Dead + Left 4 Dead 2 Bundle" will receive an extra copy of "Left 4 Dead" |
The new official l4d comic "The Sacrifice" to go with the just released DLC.
http://www.l4d.com/comic/
Sacrifice L4D 1&2 DLC details:
Quote : "The Sacrifice" is the prequel to "The Passing," and takes place from the L4D Survivors' perspective as they make their way South. In addition to advancing the story, "The Sacrifice" introduces a new style finale featuring "Sacrificial Gameplay" where players get to decide who will give their life so the others may live.In The Sacrifice for Left 4 Dead owners receive "The Sacrifice" campaign playable in Campaign, Versus, and Survival modes. In "The Sacrifice" for Left 4 Dead 2, owners receive "The Sacrifice" campaign playable with the Left 4 Dead Survivors. In addition, those with Left 4 Dead 2 receive L4D's "No Mercy" campaign. Both campaigns are playable in Campaign, Versus, Survival, and Scavenge modes and both will feature the Left 4 Dead 2 Special Infected, items, and weapons. Yes, Zoey with a chainsaw! |
http://www.l4dmaps.com/"