Halo 5: Guardians features a total of 15 campaign missions. The game follows two main storylines, focusing on the Master Chief and Spartan Locke as they pursue different objectives. The missions are designed to be played solo or cooperatively with up to four players online.
5 Missions, about 6 hours.
5-15 (gathered infermation)
There are ten levels, the first being a cutscene that introduces Noble Six (the player) to Noble Team. Noble Team consists of Noble 1: Carter, Noble 2: Kat, Noble 3: Jun, Noble 4: Emile, Noble 5: Jorge, and Noble 6: The Player. After finishing the game, there is also a bonus level of Noble 6 surviving an endless onslaught of Covenant forces that gets increasingly difficult.
5 missions
5 missions
25 story missions
There is a total of 18 missions, divided up into 3 acts. Act 1 contains 5 missions. Act 2 contains 7 and Act 3 contains the final 6.
5-6
Currently 5 with an upcoming 6th in late 2010 Halo: Combat Evolved Halo 2 Halo 3 Halo Wars Halo 3 ODST Halo Reach
15
There is no Halo 5
Their are 59 missions including strongholds and secret missions.