Halo 2 worth buying?

Is Halo 2 for the PC worth buying now? I'm a PC fan and won't ever buy a Xbox but I find that halo is fun and enjoyable to play (I play Halo 3 on a friend's Xbox every Saturday for a couple of hours). As far as I know Halo 1 is still going somewhat strong on the PC but what about Halo 2. Is it even alive? Should I buy it or not?

I haven't played Halo 2 neither the first Halo, so my opinion about Halo is based only on Halo 3. Not familiar with the others so that's why I'm asking you guys :) . Seeing your opinions I surely won't buy it, especially when I don't have any exp with Halo other than the 3rd one. Thanks for the fast replies.

Halo 2 isn't the best game, but its an obvious port from the xbox, It has a map editor and xbox live achievements but thats about all it has over the Console version, There are better games out there but halo 2 is cheap these days so It wont hurt your wallet to get it.

Yes it is worth buying, and Halo 2 on PC looks much better than the Xbox versions visuals. I am pretty sure you do need Windows Vista to play Halo 2 though, but there might be away around that, google it.

Halo 1 is good, halo 2 is just as good, halo 3 may be the best, ODST is just an expansion, Reach, idk