Available to download on PSN as 4 separate episodes of the same story, and presumably X360 and PC, the new game is based loosely around the events of the first film and builds on them. You follow the path of other park staff on the island, and also find out what happened to the Barbasol can after Nedry died. It's more of a QTE movie than a true game, not a FPS/TPS, but I thoroughly enjoyed it and recommend it
The roar of the Rex in the trailer is just one little additional one borrowed from Zoo Tycoon, but all the original Dino's do have their original sounds etc
Also, I must say right now that one of the new dino's is terrible. Such a shame considering he's one of my favourite Maniraptorans..
Well worth playing though