So much more than just a simple retexture of an old game. This isn't just the same game plugged into a new engine. There is so much more. A variety of NPC's, storylines for NPC's, better dialogue, a perfect darkened tone, everything is just at it's best with this game.
Also, the Xen levels, the biggest thing that keeps the old Half life from getting a 5 star review from me, are 100% redone and beautiful. Crowbar collective, great job.