Update: I was unfortunately not aware of Shamus Young's severe criticism of Fallout 3 available here to link in the original piece and I regret that. It dovetails rather nicely with what I've written and it's much better executed than my piece. I strongly recommend anyone...
Halo for the PC is sticks true to the definition of a port. It has the same exact scenes in the Xbox version with the exception of a minute part on the level "Keyes". The multiplayer is better varied. You can change settings and have banshees and scoripions and such on 19 new levels, 6 brillent new maps that are great for sniping and mainly used for widescale battles.
For those who are new to Halo let us recap the story that drives us to sandy beaches, cold underground tunnels, are anicent facilites. The Covenant are an elite unity of alien races on jihad aganist you. You are of most offensive to them and so the death of humans is to proceed. Well the Master Chief (cyborg on humans) is the character you play as to stop the Covenant. A little before a massive attack on the Covenant, they attack a satellite (moon) that holds the manufacturing for the UNSC (space army) and you are taken in early. Then your interstelllar ship takes off into the abyss and lands in Halo.
Halo is basically the same to the Xbox version. The controls are easy with the mouse and keyboard. The levels looks beautiful and don't require an expensive graphics card. I could play it with a 82845G Intel Intergrated Graphics with low settings and still play. As a port, and from a well respected company Gearbox, Halo stays true to it's Xbox side and shows us that great game can be made to the PC with little change. Sides, who hasn't seen or played Halo.
The graphics in Halo aren't very demanding card-wise. Most cards that came with your computer can support the game. RAM and Processing Speed aren't much of a bother. Still, if you want to experience the best colors and such for the PC, you would want to get rid of that integrated because the shine of armor, the lights, and the blood and explosions are all worth it.
The multiplayer is a vast upgrade from the Xboxs. Back when Halo first came out, there were so many servers and such. However, over the 2 years and release of Halo 2. The internet community has gone down to about a thousand players daily on any given time. But with extended options to put on speific weapons, gametypes, and such its a much needed polish. However, we lose the co-op ability with the PC. We can't connect online or even share a keyboard which would give this version of Halo a