HALO is one FPS that really did introduce many new gameplay elements. It offers all that is said below and the modifications already in development look to refine and improve the "HALO experience" even more!
This is Halo: Combat Evolved, It will take you through a diverse universe that is later expanded by it's sequels and other materials such as novels, movies and short stories. The challenges in this game will be depending on the difficulty you chose. (I suggest heroic for the best experience). While Halo: PC is the port of the original Halo: Combat Evolved for the original Xbox, it suffers due to various technical things like the low FoV (field of view) which is exactly 75 as opposed to the original game, which is 90 and various missing graphical shaders i.e.: The Jackal shields on the original Xbox version of the game are either blue/orange and has a "damaged" graphical effects if you shot them with a plasma weapon. While missing various things from the original Xbox version, it is still Halo and they even added online Multiplayer as opposed to the Xbox LAN only Multiplayer as well as some other neat additions not available on the original Xbox game. But this game has an awesome storyline and gameplay back in the early 2000s and this is the game that brings you ultimate challenge in Campaign and Multiplayer.
That's all I had to say, and that's also why I gave this a 10.
If you played this back then in the early 2000s, you probably are going to have some nostalgic memories on this game and I liked to play this game back then up to the point that this is the game I had been playing the most.
P.S. Get Halo: Custom Edition after getting the PC version of the game, tons of maps and mods as well as active Multiplayer community. You can mod the game like I do back then and make some neat AI war, with the Editing Kit available for download if you have it.
The game has this ability to give the player a grand sense of awe as you look before a big battle field allowing you to take it on either on foot, warthog (a combat jeep without a roof). The problem is it also started the whole (regenerating health and 2 weapon limit malarky).
The reason why it works here is because you also have limited health that gets damaged after your regenerating shield goes down. So its a dual system that most "regenerating health" games don't include.
Not to mention the 2 weapon limitation works in a game where every weapon is balanced, even some of the better ones have a limited ammo meaning you have to use more wisely.
The tactics involved in how you manage the 2 guns make things interesting.
But at a certain point in the game I was asking myself "what am I doing?" and "why is the game called Halo". Throughout the game it gives you a rather tenuous grasp of what you have to do and the why your doing it is very simple and not very interesting.
Fight aliens, save universe.
In the end the game seems to only include Halo at the end and the explanation behind is quite vague. Storytelling is not Bungies strong point.. or character development for that matter.
"Well of course you don't fight your way all through that, you have to go here or there to get through." This is what, for me, made Halo such a disappointment after Half-Life: just more and more and more of the same thing, and it isn't exciting or interesting, it isn't even adrenaline anymore, it's just tedious.
Nearly every Half Life sequence had a storyline logic to it -- a reason for getting through the bits. Halo you don't get that. I swear they had it done, then the project manager said, 'Hey we need about 3 more hours of game time. Add a bunch of dungeon-crawler mazes and load 'em with more bad guys at every corner.
I do like the fact that the Chief doesn't speak to his fellow marines, it just sort of emphasis how emotionally detached he is and how little their lives mean.
Adequate shooter with its own style of playing. It has unnecessary difficulties that are worshiped by its fanboys, but once you stop listening to them you're still left asking why the heck so many issues continue to go unchecked from this game onward to the latest ones. The Halo 1 pistol is the least of your worries.