Basically Halo 3 was the shit on xbox 360 and this summer I just realised a fan made mod called Halo Online came out and it's Halo 3 remastered with dedicated servers, it looks tons of fun here's a video I watched on it.
I'll leave a link to the website that hosts it, if any of you want to play i'm on teamspeak right now and probably will be for a bit.
Website
Website