Not really, it does replace it. Better graphics, gameplay, and story telling. (By story telling I mean the environmental story telling, like the sky in surface tension going from a sunny day to the sun being mostly blocked out by smoke from all the destruction.)
Worse gameplay in my opinion, weird repetitive puzzles, mostly worse soundtrack except for xen and that one lobby fight, black mesa is on the whole around the same quality as half life, not a replacement. They should both be played but if you only have time for one half life is the way to go
Not really, it does replace it. Better graphics, gameplay, and story telling. (By story telling I mean the environmental story telling, like the sky in surface tension going from a sunny day to the sun being mostly blocked out by smoke from all the destruction.)
Worse gameplay in my opinion, weird repetitive puzzles, mostly worse soundtrack except for xen and that one lobby fight, black mesa is on the whole around the same quality as half life, not a replacement. They should both be played but if you only have time for one half life is the way to go