Yes, you can download games from Steam.
Yes, you can download games from Steam.
You may set up multiple copies of a game on various computers, but you’ll need about 20 minutes to log off from any single machine when using the same account elsewhere.
Just reinstall Steam and run it once more; game codes aren’t included with the software, only linked to your profile.
G2A is a store where you purchase the game's code, they email you the code, and then you install it on Steam or Origin, allowing you to download it as many times as needed.