Play as Prof. Anders.
about $500
There are 6 Halo games: Halo, Halo 2, Halo 3, Halo ODST (Orbital Drop Shock Trooper),halo wars, halo reach. you for get halo battle evolution
Halo Wars will cost $60 at launch for the standard edition, with special editions costing extra.
You can't buy Halo Wars with Microsoft points.You have to use real money.
Go to Ebay
Orbital Drop Shock Trooper aka ODST.
The Halo games are about the Master Chief. Of course he's in all of them (Halo 1, 2, and 3), just not in Halo 3: Orbital Drop Shock Troopers, or Halo Wars.
Halo Wars
I don't know but it costs 19.99 at bestbuy. (woot!)
From what I know, there is no Halo Wars on the PC.
Halo Wars happened in 2009.
Halo Wars was made in 2009, along with Halo 3 ODST