Worth playing? Absolutely. It doesn't beat the RE1 Gamecube remake, in my opinion, but still. The game is awsome untill you experiance what I am called the most horrible difficulty curve of all time. What I mean by this, is there's no normal mode. In easy mode, you have virtualy all weapons to start with. You start with an Assault Rifle and two extra magazines in the item box, along with a shotgun, and a magnum, I believe. You also start with 250 Pistol Rounds. On top of all that, you have an infinite number of ink ribbons to start with. Enemies are extremely weak, and even Nemesis can be beaten with relative ease. The game is also overly generous with healing items.
Now, there is no normal mode, as I've said, which means hard is up. You start only with a pistol and 30 rounds, all other weapons have to be found, you need ink ribbons, health items are scarce, and enemies are tougher. One of the Nemesis versions took me two hours to beat. I ended up dying around 15 times, compared to dying not once in easy mode. Basically, be prepared to die frequently.