2's been on, like, every system at the time. I remember rumours earlier this year of RE2 being remade for the PC. It already was on the PC, but this is probably a remake. (Why not, if it's been on everything, might as well be on everything again.)
I admit to being a latecomer to the RE series, mostly coming on board after the impulse purchase of "REmake". I played 2 and 3 on the PC before playing 0 and 4 on the GameCube. We've also got Code Veronica - it came with the Dreamcast my brother bought on eBay a few years ago. (Not really sure why - I think he got it for Shenmue but he doesn't even play that much because he doesn't like some forklift race or something...) For some reason I didn't get very far in Code Veronica and didn't care much for it...but maybe one of these days I'll try again, since I do like the series enough that I probably should.
I really liked 2 for some reason, perhaps that's why it was ported so much. I'd recommend it. 3 wasn't as good though. Since C:V isn't in this Umbrella Chronicles I'm wondering how important that story is, but from what I briefly glimpsed in a story FAQ I thought it would be important enough to mention...