Uninstalling games and reinstalling games doesn't cost any money. The only thing that costs money is if you buy a game.
yeah go to ur game library and press install
It is free on Steam until the 20th of September. Just go to the Steam store and search for Portal. It says it costs money but you can install it without paying. Enjoy it, it's a very good game.
You need steam to install Portal 2 Why not? It's free
If you have purchased the game on Steam then you need to install Steam on that PC and there should be an install button on the game in your Steam Library. If you have the disk version you just have to put in it and install it using the CD key that came with it.
Yes
In the games tab, click "Activate a product on Steam..." to install the game if you have the CD. If you bought the game from Steam, you should see it on your games list. Right click it and install it.
If you bought the game from steam, no. and if your trying to put a game on your computer and it keeps adding to steam, than un-install steam while your trying to install the game.
Steam
The Steam client can be downloaded from their official website, linked below.
if you have steam you can install it from there but if not you will manually have to place the files in the correct place
Civilization 5 is powered through the Steam system so you will need to install Steam and create an account to install and run the game. (See links below)
You can buy it from Steam or install it with the CD.