http://www.mame.net/
That's the way to go if you want to play old arcade games (ah, the memories) on your PC.
Just dld the thing and dld a ROM and you're good to go (or, rather, your B/F is).
If he really likes old games like that, I think he'll have enough to satisfy his hunger for quite some time.

PS: I edited out the name of the game out of precaution. I think it's still copyrighted.

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

"Raise your can of Beer on high
And seal your fate forever
Our best years have passed us by
The Golden Age Of Leather"
-Blue Öyster Cult-