Yes, almost all games bought and/or downloaded online don't need a disk.
If you have no disc you can download a patch where the game will play with out the disc.
There is no software which will convert a PS2 Game Disc into a PC game Disc. PS2 emulation could allow a PC to play a PS2 game if you could find and download a reliable emulation
You either purchase the game disc or a download for the PC version of the game
You must purchase the game disc or the PC download
Yes there is an Alcatraz PC Download and also a Planet Alcatraz download Windows 7 and Vista have a Prison Tycoon Alcatraz game disc for the PC
To install MotoGP 07, insert the game disc into your PC's disc drive or download it from a legitimate digital platform. If using a disc, follow the on-screen prompts to complete the installation process. For a digital download, locate the game in your library, click "Install," and wait for it to download and install. Once installed, you can launch the game from your desktop or game library.
yes or a game download
You need to have the game disc or download and a platform or PC
Install it using the same installation key and disc.
Of course, if you go to the store and want to buy both games do they give you one free. It's illegal to download the PC copy of the game if you purchased the PC game disc and not the download.
no
you got to your PC and put your PC game disc in your PC or Purchase a download for the PC. Without the Game's purchase you can not go to a site and just play the game