As of 22/02/2012 04:09AM GMT, no.
Yes, any game published by Valve requires that you use their content service, Steam.
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.
no you can add other games you have on your computer open up steam click top left conner bring down a scroll bar and select add program you can add chat programs other none steam games to be in your library so you can start game right from steam and use steam while playing with friends on none steam game.
After you purchase it, then you must go to your steam client on your computer, then right click and start the download. You'll see a progress screen if your game is downloading.
usually you just right-click the game then properties, then unistall
You cannot turn a non-steam game into a steam game, however, you can add it to the list of your steam games by clicking the "add game" button in the "library" section. This will not make it a steam game, it will only cause the game to show up on the list.
Depends which game but generally you should verify the integrity of the game (right click properties local files 3rd button down) which will check for and corrupted or unupdated files or just uninstall and reinstall the game.
go to the page that says campain and bouns enter down,up,left,right,right,right,up,down
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.
right click the downloading game and left click delete local content this moves the game to the not installed list
Try Valve's Steam service. It is a free service and at this time, the "Unreal Tournament: Game of the Year Edition" is 9,99$ without the additional Steam cost. But the game eventually end's up to 11,89$. I recommended it because you run it on Steam and there is no compatibility issue with your current OP (Operating System). Even if the you don't actually have the disk, you can download it many times to install it. Have fun !
To fix a game that is stuck running on Steam, first try closing the game through the Task Manager by right-clicking on the taskbar and selecting "Task Manager," then ending the game's process. If that doesn't work, restart your computer to clear any lingering processes. You can also verify the game's files through Steam by right-clicking the game in your library, selecting "Properties," then "Local Files," and clicking "Verify Integrity of Game Files." If issues persist, consider reinstalling the game or checking for updates.