There are missions that are 10 minutes long and some that are 60 minutes or longer.
Mostly though, the average is about 20 to 30 minutes on Normal difficulty.
HALO Wars has the most levels. But if you're just talking about the regular first person HALOs, then HALO 2 has the most levels.
There are 15 total campaign missions.
Halo Wars
From what I know, there is no Halo Wars on the PC.
Halo Wars happened in 2009.
Halo Wars is a real-time strategy game developed by Ensemble Studios and published by Microsoft Game Studios. It involves long term and short term strategy, and is exclusive to the Xbox 360. Unlike its predecessors, Halo: Combat Evolved, Halo 2, and Halo 3, Halo Wars is NOT a shooter game or action game.
To gain technological levels as the covenant, you need to construct a Temple and upgrade it.
Halo Wars was made in 2009, along with Halo 3 ODST
Do you mean "Where is"? A game like halo wars is called Halo.
No. Halo Combat Evolved happened about 20 years after the events of Halo Wars.
Actually, I don't think there will BE a Halo Wars 2. There's Halo: ODST and Halo: Reach. Those came after Halo Wars (correct me if I'm wrong).
find halo wars and click it