How many missions and playtime ?

[MafiaBigBoss]

I wonder how many missions the campaign has and how many hours to finish all of them ?

[MDuh]

This is my experience so far:

8 missions, can take 1-2 hours per mission to finish (if done stealthily)

Coop time (all missions, marksman(normal) difficulty): 4 hours in rush mode (no stealth)

Single player campaign (Single pass through (doesn't care about collectibles or achievements), done stealthily, sniper elite(hard) difficulty): 12 Hours

Then you can replay those single player missions to do the collectibles and side achievements.
Also there are also multiple paths that you can take in the map so each map is at least replayable 2 times.