Halo: MCC is rough around the edges, but has a really solid core.
Pros:
-Classic Halo games in 1080p, 144+ Hz, and modern-day bells and whistles
-Most features in the original games made it to MCC
-A pretty rewarding progression system, assuming you like the modern battle-pass style progression

Cons:
-Game feels like it's held together by paper, Scotch tape, and a prayer often times
-Menus leave much to be desired
-Weird bugs

I'll harp on the pros first. Being able to play Halo 2 on PC at high refresh rates with a mouse and keyboard is amazing. These games are still just as fun as they were back in the day, and are even better with friends. I still have tears flowing down my face from laughter when a group of friends joins me for custom games, and it often feels like Halo never slowed down. On top of that, being able to quickly switch between each Halo game with relative ease is amazing, and is great for mixing things up when one particular game gets a little stale.

Now, for the bad. This game often feels like it's barely functioning. With the crashes, audio cut outs, and bugs, it can be somewhat frustrating at times to put up with. These aren't *common* per se, but they're frequent enough to where you're not super surprised when they happen. Here are a few bugs that I can think of off the top of my head:
-Alt-tabbing made my game disappear. Not crash, just go away. Task manager still sees the program, but I was not allowed to alt-tab back into the game. Had to google a fix, but the bug is still prevalent, and the fix was somewhat buried in a forum.
-Audio will cut out in different games at different times. This has been a running issue for a while
-Halo: Reach Forge boasts a $30k budget as opposed to a $10k budget from the original 360 version. This would be great if you could use it all. I've built not one, but two maps that have run into what seems like a "piece limit", with still around $12k-$13k budget remaining. Not a big deal if you don't use Forge, but if you do, when the pieces start to flicker in certain areas, you're approaching that limit.

Aside from that, the menus leave much to be desired. I have around 70+ custom games for Reach, and only being able to see three of them at a time in a horizontal-scrolling menu without any alphabetization is kinda of a huge pain in the ass. Not to mention that changing teams is more complicated than it needs to be, and the armor customization menu is not great either. In my opinion, a UI overhaul is something that I think would greatly benefit the game's flow and feel.

Now, having said all of that, I still love this game. Sure, it's nostalgic, but nostalgia doesn't get me 450+ hours. Even though there's still a lot to be desired, 343 is still actively updating the game with monthly updates that include content and bug fixes, along with blog posts outlining features actively in development, and ideas they would like to implement but haven't quite started on yet. I've reported numerous bugs, and have gotten a response saying that most of them have been fixed some time after I've submitted it. It seems like this game will have support for quite a while from now. Lastly, a lot of these things (I think) can be explained by time constraints. Halo: Infinite was supposed to launch at the end of this year, and 343 wanted to have every prior Halo (except 5) ported to PC and added to MCC before it's launch date. Well, Infinite got delayed until some time next year, so now we're kinda left with a semi-buggy game that may not have been that way had it not been rushed.

TL;DR Halo is still phenomenal, but some bugs and lack of polish in some areas hold it back. Despite this, the game is still actively in development.

Halo: MCC is rough around the edges, but has a really solid core. Pros: -Classic Halo games in 1080p, 144+ Hz, and modern-day bells and whistles -Most features in the original games made it to MCC -A pretty rewarding progression system, assuming you like the modern battle-pass style progression Cons: -Game feels like it's held together by paper, Scotch tape, and a prayer often times -Menus leave much to be desired -Weird bugs I'll harp on the pros first. Being able to play Halo 2 on PC at high refresh rates with a mouse and keyboard is amazing. These games are still just as fun as they were back in the day, and are even better with friends. I still have tears flowing down my face from laughter when a group of friends joins me for custom games, and it often feels like Halo never slowed down. On top of that, being able to quickly switch between each Halo game with relative ease is amazing, and is great for mixing things up when one particular game gets a little stale. Now, for the bad. This game often feels like it's barely functioning. With the crashes, audio cut outs, and bugs, it can be somewhat frustrating at times to put up with. These aren't *common* per se, but they're frequent enough to where you're not super surprised when they happen. Here are a few bugs that I can think of off the top of my head: -Alt-tabbing made my game disappear. Not crash, just go away. Task manager still sees the program, but I was not allowed to alt-tab back into the game. Had to google a fix, but the bug is still prevalent, and the fix was somewhat buried in a forum. -Audio will cut out in different games at different times. This has been a running issue for a while -Halo: Reach Forge boasts a $30k budget as opposed to a $10k budget from the original 360 version. This would be great if you could use it all. I've built not one, but two maps that have run into what seems like a "piece limit", with still around $12k-$13k budget remaining. Not a big deal if you don't use Forge, but if you do, when the pieces start to flicker in certain areas, you're approaching that limit. Aside from that, the menus leave much to be desired. I have around 70+ custom games for Reach, and only being able to see three of them at a time in a horizontal-scrolling menu without any alphabetization is kinda of a huge pain in the ass. Not to mention that changing teams is more complicated than it needs to be, and the armor customization menu is not great either. In my opinion, a UI overhaul is something that I think would greatly benefit the game's flow and feel. Now, having said all of that, I still love this game. Sure, it's nostalgic, but nostalgia doesn't get me 450+ hours. Even though there's still a lot to be desired, 343 is still actively updating the game with monthly updates that include content and bug fixes, along with blog posts outlining features actively in development, and ideas they would like to implement but haven't quite started on yet. I've reported numerous bugs, and have gotten a response saying that most of them have been fixed some time after I've submitted it. It seems like this game will have support for quite a while from now. Lastly, a lot of these things (I think) can be explained by time constraints. Halo: Infinite was supposed to launch at the end of this year, and 343 wanted to have every prior Halo (except 5) ported to PC and added to MCC before it's launch date. Well, Infinite got delayed until some time next year, so now we're kinda left with a semi-buggy game that may not have been that way had it not been rushed. TL;DR Halo is still phenomenal, but some bugs and lack of polish in some areas hold it back. Despite this, the game is still actively in development.