campaign is around 5 plus hours on normal. I didn't find any collectibles in the game. Nor there are any trophies to it. Each mission has a couple trophies related to the character you'll be controlling. The game goes between flashback missions for each character and cutscenes in the present. The first and last mission occur in the present timeline in the game, and the rest happen in the past. I felt it was a bit disjointed as the whole game you're just reliving memories of different battles. I hate when games do this where most of the content is flashbacks. Rather do them sequentially. What ever. Missions occur in city, jungle, snow, and one mission is entirely a flying sequence. Probably my favourite mission but controlling the plane was a bit hard for me.
My only complaint are the guns. It takes forever to reload lmao. I have OCD, so i tend to reload a lot and this game wanted to make me hang myself. You can't choose attachments for your guns so you got to hope to pick up a gun with that attachment like fast mags and extended barrel etc.
It's ok. Not the best campaign, not the worst. The best thing you can say about it is there aren't many long sections where you're just walking around. It's paced quickly going from one map to another with in between cutscenes. Not gonna bother with veteran mode as the reload is gonna make me want to jump out my window.
Gonna try zombies next.