Ok, so I managed to get Quake, and just installed it.
My setup is an A2500 with a Blizzard 060 card, 32mb of ram, a Picasso II+ vid card and OS 3.9.
Quake runs ok but is really only playable at 320x240.
My question - I also have a Picasso 4. How much more would it improve things? Ie. would I be able to play at 640x480?