TSR had such a hard time branding anything as Not D&D. As to a bad time, it's almost an understatement. Bad time = as the company is folding like a house of cards.
I have one Alternity book, the player's manual picked up at a used book store. I can't say I've looked at it in depth. At the time it came out I was short on cash and didn't have time for other game systems. I have seen they go fairly cheaply in the used market.