Out of my massive library of games, I find myself coming back to this one, time and again. Why? I think it's because everything about Halo is just right: you have a clean story (cadging from multiple science-fiction staples), engaging--if simple--characters, and a gameplay that is both balanced and somewhat open. As time goes by, the only problem I've encountered is, ironically, with Microsoft Windows Vista: at random points in the game, my framerates drop to single digits with no apparent cause or cure.

The gamplay for Halo is just plain fun: whether it's the steady drama of the single-player campaign or the insane mayhem of online play (warning: obnoxious people exist in large numbers on the servers), Halo is an enjoyable way to kill some time. When I say that Halo is "balanced", I mean that instead of a growing arsenal of more powerful weapons, you are always limited to only being able to carry two at a time. This limitation forces you to think on your feet, and it rewards you as you make discoveries: each type of enemy has different ways that work best to bring them down. There is also just enough AI to make repeat gameplay not as predictable as Halo's predecessors. This is what makes it more "open" than older shooters: I've had fun trying crazy things, like destroying a tank armed with only a pistol and a couple of grenades. I've also sometimes been surprised when an enemy does something differently: if you stick a plasma grenade on a bad guy, they might turn and run back to their friends...or they might just charge straight at you and try to take you with them!
At the current price, I highly recommend picking up a copy of Halo for the PC. You may not get stunning visuals, but you will have a good time.

Halo Combat Evolved for the computer packs loads of new features. Easy to learn online play, custom and modded maps, the ability to play user-created maps with www.halomaps.org, create your own maps with the HEK (Halo Editing Kit), and all are free to download. The online play is free, and the single player campaign is very fun. I highly recommend.

My sons really love this game. When we received it we had some trouble getting it loaded properly. I had to search for the correct or updated drivers to make this work.

Halo: Combat Evolved

A great game! I am even playing with my Son and Grandchildren over the Internet. A great way to keep in contact and have some fun!

its just halo from the original xbox, simple, fun, competitive. the online works great
only thing bad is its an old game but thats not really a factor for me