ODST is a bold and ambitious entry in the halo franchise. The game oozes atmosphere as exploring the fallen city looking for your comrades is chilling. The missions as the troopers are excellently designed with each focusing on a different aspect of the halo sandbox. The crew themselves while stereotypical are likeable despite my concerns during the intro.
The weak point of this game is that while exploring the city serves the story and atmosphere the gameplay usually involves walking from point A to point B with a few small skirmishes in between that can easily be avoided. They added audio logs to give you more to do in the city portions but to compensate for having so many each individual tape doesn't give enough interesting information for them to be worth searching for all 30. The health system is also changed to be more like halo 1, which accomplishes the games goal of making you feel weaker but weakens the enjoyability of the missions some what.
Firefight is halos answer to cod zombies or horde mode is a fun addtion to the franchise especially with friends.
Overall I am conflicted on ODST as its atmospheric city streets and excellent mission design are a testament of bungies quality but yet I still don't feel strongly about this game looking back. Curious to see if this changes after more playthroughs

Halo 3 is the culmination of everything the franchise was up to this point. The campaign feels like a action movie as you jump from set piece to set piece with excellently designed levels one after the other. The story wraps up well giving fan favourite characters memorable moments and ends the trilogy conclusively while still leaving the door open for more. The campaign maintains a level of consistency that prior games and other franchises could only dream off.
The multiplayer is more iterative than revolutionary but when your building off Halo 2 there isn't much room for improvement.
Halo 3 is a true epic that stands tall among gaming's best

Halo 2 campaign is all over the place in a different way to CE. While CE's 1st half is amazing and the 2nd half is only ok Halo 2 flip flops in quality level to level. Halo 2 has some of the best and some of the most forgettable missions in the franchise. The enemies also feel quite spongy in comparison to other entries. The story continues to be compelling and through the arbiter a new side of this universe is explored. The campaign lacks the strong the ending of its predessor and its successor but pumps you up to finish the fight.
The gameplay itself is much improved with the addition of dual wielding making you feel like a certified badass and new weapon types had to the sandbox brilliantly. The multiplayer sweet retains the Arcady fun of its predecessor but refines it in such a way that it's near indistinguishable from modern shooters.
While its clear that its a bit rushed the size of it's ambition is undeniable and the impact of its awesome multiplayer can still be felt all these years later