I know there were some games that you couldnt run on the A600 like speedball 2 and such but was there a way to make them run without using the hard drive install program ?
Also is there a full list of what games dont run on the A600 too ?
A 1.3 ROM will help with some games. But those that are keyboard dependent may prove troublesome.
A few that will boot and run (sort of) are; No Second Prize, Hunter and F19 Stealth Fighter. First Samurai and SWIV won't run at all. Generally speaking, if it doesn't run on an A500+ it won't run on an A600.
I've never tried WHDL, so I can't comment on whether any of the above will work. I remember using a degrader some 15 years ago for running games on my A500+ and A1200, but the results weren't very good.
If you can, get hold of a bog standard A500 with 1/2 Mb upgrade as that'll run a good 90%+ of non-AGA games.