Yes you can. You can run AH using Virtual PC, which will work on a non-Intel G5 as long as it has the correct Mac OS. Not saying the performance is going to be anything to get excited about but at least there is a way he could run AH on an old non-Intel G5.
ack-ack
My Mac:
G5 w/Dual CPU 2.0ghz, 3.5 gigs of Ram, ATI Radeon 9800Pro AGP w/256
Tried running this on VPC.. Totally unplayable even at the lowest possible graphic settings...
Plus, VPC doesn't support any kind of 3d hardware and all rendering is software based..
Sucks because there really aren't many decent games for the true Apple Mac G5's..
And the ones you do find are crazy expensive unless you find one at Halfprice Books or something..
The stuff that IS available plays really nice and looks even better....