You could try playing them when they are not at home or when they are sleeping and just un-install them before they wake up or come back home. This would probably be risky because if you got caught you would be in trouble and loose your parents trust.
Though some laptops and PCs have special features that hides games in he corner of your screen and only appear when you put your cursor on it.
I'd recommend, if u don't need to download it, get a couple of internets going and click on a different intrnet wen dey come. idk really.
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No, games need to be installed locally onto the hard drive of the computer you wish to play it from.
You don't use a PC to get games from the PSN, there might be some free games released on it sometime, like Treasures of Montezuma: Blitz on PS Vita.
PS3 can not play computer games so just download them on the computer
Yes, yes. You can either buy Ultra Mini Discs or download games from the PlayStation Network directly from the PSP.
You can download free computer games from Blogs. See the Related link below to download Free Computer Games.