I bought ODST when it was first released and it was whole new feel compared to halo 3. Instead of being master chief with regenratable shields and heavy armor, you play as normal soldier rookie. What made it so immersive is that you were exploring New Mombasa at night alone. You had to keep check on your ammo/health and salvage what you could, while searching for audio files and trying to find out what happened to your team. What really set the mood was music, it made it feel as if you were rookie and alone in this big city. In my opinion Halo ODST is one of the best halo games, way better than Halo Reach, story wise and it's way too underrated game. Of course there was always room for improvement like firefight matchmaking and just like someone said suppresed weapon should be more effective. And if I'm right it was 343 and Bungie that teamed up and made ODST. (Game intro shows). In fact just few days ago I just bought ODST again just to experience it all over, it's best played on Legendary. I do wish one day they would make another ODST.