Yes about all games can be found on internet. There are several ways to get these games to run on the Atari.
The first one I ever used was Sio2PC. Since the Atari already uses a serial port for most peripherals it was dead easy to make an RS-232 compatible port using only 1 tiny chip named the MAX232 (IIIRC). I installed one inside my XE and made a standard sub 9 d connector on the backside.
However, this of course requires a PC with real RS-232 ports and these get more rare these days.
Of course the PC needs some software, called APE. This software emulates 8 floppy drives, printers yes even modems. The Atari needs nothing more, it will see the drives just like real one's.
There are also ready built Sio2PCs, the latest support USB.
Later other solutions came up, such as Mr. Atari's brilliant (but in essence pretty simple) IDE solution called MyIDE. This makes is possible to hook up any IDE Harddrive or flash module.
The latest MyIDE has just been released and uses CF cards. There are many more solutions, but here is an excellent starting point:
www.atarimax.comYou will find the Sio2Pc, MyIDE and APE there...
P.S. If you like Miner/Bounty Bob, also make sure to try Mr. Robot and his robot factory. Another game that is much nicer on the A8 then any other system

Oh and Alley Cat is the best game on the system, period. Perfect graphics, perfect sound, perfect gameplay, you'll love it ! If you want to know where Alley Cat "came from" try to find a game called Salmon Run (IIRC). AFAIK this was a "type in game listing" from Antic magazine. It's much simpler than Alley Cat, but you can clearly already recognize the style of the graphics, some humor and especially the great "water" sounds
