Yes, you can install games multiple times.
Yes, you can install games multiple times.
It's identical unless the game is already set up; then the required files are ready and you just need to duplicate them.
Steam games are hosted on the Steam platform, accessible through a web browser or Steam client.
You can try installing your game library from multiple Steam locations. I’m not certain of the exact details now, but there was a mod for Portal 2 that needed similar workarounds to run with a regular version.