What comes to gameplay, I hope the campaign to be long. Although I don’t see how free roam could be done without concentrating on a very small area, I have nothing against it. Personally I would prefer a semi-linear experience with just more routes to encounters and objectives, something that Bungie said Reach would be, but we never really got that kind of experience. Anyway, I would like to choose from many different routes.
By different set of routes I mean routes designed for different types of gameplay styles: hidden shortcuts for speedrunners, beautiful, “scenic routes”, ability to choose between vehicle and on foot, ability to sneak in/through. Lots of different ways to complete the mission. By hidden I didn’t mean literally hidden, but routes that are visible, but you just don’t think them in normal gameplay or routes that you can’t see from normal positions.
I would also like to see the levels being explorable. Who here has ever played on Tsavo Highway? Yeah, probably everyone. Who here has always wanted to be able to run above the normal gameplay area on the hills? I still believe everyone will answer positively. Good example is Outskirts in Halo 2, the rooftops aren’t easily achieveable and you won’t realize very well that you can get there, but once you get there it’s super fun to explore.
Of course there is a reason why routes are usually blocked by invisible walls, the reason is that developers don’t want for some reason to show the low quality areas, possibly because it could break the immersion. But really? Let’s stop for a while and think about it. Those places aren’t usually easily accesible and require pretty innovative routes, a player who wants to keep the immersion will never try to get there. And who actually gets bothered from seeing low quality textures outside the playable area. This is why we should be able to explore outside the normally playable area, of course it wouldn’t be easy, but developers need to realize this is fun for the players and doesn’t bother anyone.
Then collectibles. Skulls are already confirmed in CEA, I assume they are going to be in Halo 4 too. And I really do hope that they are as collectibles in Halo 4, they’re just so fun to look for while exploring the map. But skulls aren’t really only collectable thing. Halo 2 had Scarab Gun, who here would like two of those (or of similar purpose) in Halo 4 as collectables, and when both collected, you could enable them in the same menu as skulls and spawn with them at the start of the level? I know I would. They would of course be super hard to reach, (something like the IWHBYD in Halo 2, but with more jumping (launching?)).
Halo Reach introduced us to data pads, my only problem with them was that I actually only had one chance to read them and if I wanted to read them again I needed to go back and find them. This combined with the somewhat boring campaign of Reach lead me to just read them on Halopedia. Anyway, they should appear in some kind of menu when collected, very much like Sadies story in ODST.
Lastly, of course the campaign needs an immersive story and to look beutiful. I personally didn’t like Reach because it looked boring, sad, ugly, grey, and depressive. Only really beautiful skybox, that you won’t get bored to was the space section on Long Night of Solace. In previous Halo games nearly every skybox has been astonishingly beautiful, I want this to return. I will probably be pretty happy if Halo 4 looks somewhat similar to CEA, maybe with one shade less brightness on colors and with gigantic and mysterious Forerunner structures.
I don’t have much about the story, just if it’s anything on the level of Halo 2, I will probably be pretty happy about it.