How many halo video games are there

There are currently seven (7) Halo Series Video Games: Halo: Combat Evolved, Halo 2, Halo 3, Halo Wars, Halo 3: ODST, Halo: Reach, and Halo: Combat Evolved 10th Anniversary Edition. The release of Halo 4 from 343 Industries will increase the total to eight (8).