I loved Halo back in the day, I don't know how many hours I played just the first game, it was easily hundreds because my and my buddies were doing LAN parties like every weekend if we could, playing all night long, most of the time in full 16 player matches with multiple tv's and xbox's hooked up. Our favorite game mode was no shields CTF, so we'd spend sometimes an hour or more on just a single match, because it was so easy to kill people with the magnum at distances, using all the glitches in levels like Sidewinder where you had to perfectly dismount a ghost before crashing into some bars which would squeeze you through, but half the time would just kill you, or the glitch in Blood Gulch that would launch you from a ghost up a cliff wall and you had a sick sniper spot on a cliff edge you weren't supposed to be on lol
I'm sure the campaign doesn't hold up as much as it use to, but I've been meaning to go through the CE version of it as I only played abit of the first level like last year. I'm actually pretty stoked to get back into Halo with the new game when that releases as it's getting its first new PC release since Halo 2, though the only PC version I played was Halo 1 back when that game out, which was almost like its own game in a way compared to the Xbox release.