Let's be real the game would be an awesome game if it didn't had the tittle Halo.
The map its beautiful and the movement is great but its not Halo.
The campaign fails to highlight anything that makes Halo a Halo game.
The epic war battles, the constant feeling of mission urgency, the plot development of the war along side the other character.
All this things make a Halo game what Halo is
Now this game is by no means bad but its not a Halo game, its an open world exploration space ranger adventure which honestly would've been a great game like that.
Any of the prior plot of the games is essentially thrown out and non of the past characters make an appearance and not to mention that at the begining they lost? Why? How?
Humanity had been fighting a war outnumbered 3 to 1 and never lost but now they did because?
All in all its a good game that does not deserve to be called Halo.