Halo: Combat Evolved is a very important game for the FPS genre, but sadly it's campaign shows it's age. Halo is great and it still looks great in 2023 and has fun levels. But parts this game can really feel aged. Stuff like the the reuse of the same room (you know the one) and missions like "The Library" sadly drag down the experience and makes it less replayable than other games in the franchise.