Halo: CE’s campaign was unique. None of the subsequent entries in the series quite managed to recapture some of the amazing moments or set pieces that it possessed.
List here some things that Halo: CE had that no other Halo game has done, or had in quite the same way.
I’ll start.
-Multiple moments in the campaign where you just sit and observe the environment as an ambient, wonderful soundtrack plays. There was one in Halo 2, where you ride the gondola on Sacred Icon, and there was one in Halo 4, near the beginning of the level Requiem, as you exit the tunnel.
-Satisfactory spare ammunition for human weapons.
-A plot twist as shocking as the Flood.