Oh I still play this on PC like almost every day but people are very slowly losing interest. We need to do a T9k game night with it though.
The game is still pretty fun and fucking infuriating at the same time.
First off you are most likely gonna be playing online which means you are gonna have to lead your shots. Meaning if your target is moving you need to aim ahead in the direction of their movement. Depending on the speed of their movement you will have to lead a lot or by a small amount. Note that these are all hitscan weapons you need to lead with. I don't know what kind of shitty mcshit netcode this is or whatever but older games NEVER had this kind of problem online, Quake, Tribes, Unreal, Serious Sam, the list goes on. Ironically all this fucking leading during games made me a beast at Tribes Ascend when I started playing that cause a lot of weapons there are projectile weapons.
Which leads me right into another issue. Some of the maps on rotation in some servers are just not good maps for CTF. Prime example being goddamn Rat Race. If the server goes up to the full 16 players holy shit this fucking place will just turn into a grenade fest and NOTHING WILL HAPPEN, and almost always the team with the flag uphill will win. Danger Fucking Canyon if the teams are even in skill this will just turn into a stalemate. Tunnels are a grenade and heavy weapons fest while the open area is defended with hog turrets, and if you ever make it to base you will always find someone with a fuel rod waiting for you.
This leads me to another issue, a lot of the servers are modded...badly. All rockets, all snipers, infinite nades, fucking tanks everywhere all make getting the flag IMPOSSIBLE. If anyone scores it is pure luck or the other team is busy playing with their dicks. And don't get me started on the health pack teleporters. They lead to really retarded areas or just straight to the other teams base, which makes chasing the flag carrier impossible. Spam fest, rocket fest, vehicle lag, leading bullshit all cripple these servers and will drive you mad thirsty for a normal populated vanilla server (rare).
And when you get to these rare servers you will run into one of the most infuriating problems with online Halo CE. Fucking moderators. I don't know how this happened but most servers up at the moment are clan servers. Clans that take themselves so seriously it will make a hardened serial killer blush. Clans populated by fucking teenagers or preteens with power issues. And some of them are moderators. And they will ban you for retarded ass reason like, cussing, being rude, trolling, breaking the rules. Now these all sound like normal reasons but these mods are itching to ban people and will interpret anything as rule breaking, and the problem is it doesn't apply to everyone. Half the people get away with it and the other half get shit on, and you are forced to trot your retarded ass over to their embarrassing xXxProForeverYoloSwagLickMyFuckingBallsxXx clan website to appeal the ban because there are so many servers left.
Well getting that off my chest felt good. Other than that the game is still enjoyable.
PS: did the xbox version have online play? did you have to lead your shots in online play?
Edit: Also another problem is the unusually large amount of Mexicans that play Halo online. If you get these Mexicans in your server you will get ungodly ping spikes that will make you want to eat shit. And most of them don't speak english so any sort of team communication will be met with, "JAJAJAJJAJAA PUTOS CULOS" or some fucking shit. Don't mean to be rude of course, got nothing against Mexicans.