Pretty sure it's the 1993 base model. There was a HardRock in a similar colour in 1995 but the seat tube collars are different. This one has the chunky collar that was on 1993 and earlier models. The original shifters on this example have been replaced with some cheap (pretty unpleasant) twist grip shifters.
To my mind, these are not bikes to keep original: the low end 1990s components are heavy and not very nice to use. However, if you do a Google image search for 1993 Specialized HardRock, you'll find that people have done all sorts of interesting things to theirs, giving them a second life, and getting good use out of them.