You can't play PlayStation games on the Internet, but if you have a PlayStation 3, you can go on the PlayStation network and play with other people through the Internet.
You can not play PlayStation 3 games on a PlayStation 1, but you can play PlayStation 1 games on a PlayStation 3. All of the PlayStation consoles are backwards compatible.
You cannot play Playstation 4 games on a Playstation 4 console. You are also unable to play Playstation 3 games on the Playstation 4.
you can only play playstation games on PlayStation 1, 2 and 3
No. PlayStation 3 games are not backwards-compatible with the PlayStation 2.
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To play PlayStation 3 games online you need a PSN account. To create a PSN account visit the official PlayStation website and go to the PlayStation Network section of the site. To play online also requires a broadband internet connection to your PS3 system.
No, you can't play ps3 games on the ps2.
Playstation 3 can play old Playstation games, but Playstation 2 games are not compatible. You can load some playstation 2 games using the hard drive and an emulator, but not all.