No, a legal copy of the game cannot be copied to a external HDD and be played. Many of the games files are spread across the computer. The game needs to be installed directly to the drive when the game is being installed.
If the hard drive is formatted so that the operating system on the other PC can see it and read it you can plug it into the PC and drag the files onto the PC's hard disc.
1. Plug in the hard drive 2. Open My Computer. 3. Double-click on your hard drive's icon. It is likely labeled either "Removable drive" or with the name of the manufacturer. 4. Drag files that you...
game cartriges that have been writen to and can be used to play a game are usually rom's. read only memory. so unless you have a blank cartrige and a way to write to it, no, you cant.