It really didn't add anything new to a genre except being an exclusive game on a newly minted console by Microsoft.
What the original
Halo had on everything else in the genre was a few things:
[ul]
[li]One of the smartest
health systems around. Where earlier shooters used purely health packs, and later shooters used purely regenerating health,
Halo was unique in that it used both, fused together in a way to create a good balance that worked well on any difficulty level.[/li]
[li]Really, really good
level design. While there's no question that it wasn't perfect ("The Library" was unequivocally bad), overall it was far above average. Both in general and especially at its very best, its levels, in both single- and multiplayer modes, tended to be better than any other game out at the time. "The Silent Cartographer" continues to be brought up in conversations about level design as a pretty much unmatched example of doing it very right, even sixteen years later.[/li]
[li]
Mixing features.
Halo wasn't the first game with vehicles, or a carry limit on weapons with swapping between only two, or large, open levels, but it was the first game to have all of these features together in one game. In that sense, it was kind of a "best of" compilation of great features that many games would only have one or two of.[/li]
[li]
Amazing music. I don't need to explain this one.[/li]
[li]A really strong
personality.
Halo is not content just to tell a story. It sees fit to litter its world with memorable little details. The enemies have their little quips. The grunts are a ton of fun. Even the AI behavior has personality, with enemies behaving more cowardly or aggressively depending on what type of enemy they are. It makes the world feel more alive than virtually any other game available at the time.[/li]
[li]Sheer
polish.
Halo doesn't just have a lot of stuff. It has almost exclusively good stuff. Even if there is no single *wow* new feature, no one giant, stand-out innovation to point at and say "this is what makes the game special", it gets all the little things right.[footnote]Except "The Library". Seriously, screw that level.[/footnote] You would never know, to play it, just how short its dev cycle was.[/li]
[/ul]
It's true the franchise has gone downhill, particularly since 343 Industries took it over. But the first one was revolutionary, not for any one big reason, but for a dozen small reasons. It's easy to look back on it now and not realize how important it was, but it standardized so much of what we take for granted in the genre today. Compare it against the best shooters of the time,
Perfect Dark,
GoldenEye 007,
Quake III Arena,
Starsiege: Tribes,
System Shock 2, and even
Half-Life, and it blows them all out of the water, despite doing almost nothing that at least one of those games hadn't done already. It
didn't need to add anything new to a genre. It needed to combine a ton of things other games had already done, but do them all better, and that's just what it did.
P.S. Thanks
P.P.S. Can someone explain to me how
Destiny turned out so reeky? I would've thought that having so much of the old
Halo: Combat Evolved through
Reach team would've led to pure magic, but at its best it feels like a half-hearted
Halo clone and at its worst a bland grindfest. Seriously, Bungie, y'all can do better.