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No. If you buy it on steam, then you will be able to download it to your steam games library and install it. After you do that, you'll be able to play it on steam. However, if you're on a mac, you can't play terraria. By the way, you have to buy the collector's edition to get a physical copy of the game.
You can't.
If your laptop has the required processing power, you can play Steam games on your laptop. Both my brother and I play Steam games on our laptops.
In order to play the DLC (downloadable content) "Zombie Island of Dr. Ned", you need the full main game Borderlands in your Steam games library.
it starts its download in your library, then you can play it
Go to your games library and select Portal on the left pane. Then in the middle window, find the small "play" button under the game's title.
as many as you want to download they are free to play and Steam will never limit you for free games :) they are awesome like that.
steam sometimes has a free weekend for games but you don't get too keep it.
Yes you can.
If you have bought the game you can go to the 'library' section on the top bar next to 'store' a list of your paid full games and your demos willl appear, just click the install/play button next to the game's name and voila.. have fun
Popular ways to play free PC games without ads require a game client such as Steam Download the Steam client to download and play free games. There are also PC games available for purchase on Steam.
No.