Look it up in the halopedia at halo.wikia.com. It should list all human characters.
The names of all the Halo games are (in order): Halo: Combat Evolved, Halo 2, Halo 3, Halo Wars, Halo 3 ODST, Halo Reach, Halo: Combat Evolved Anniversary, and Halo 4. In chronological order: Halo: Wars Halo: Reach Halo: Combat Evolved/Anniversary Halo 2 Halo 3: ODST Halo 3 Halo 4
you get all the vidmaster achievements on halo 3 and halo 3 odst
Halo 3, Halo wars, Halo 3:ODST and Halo:Reach
All in halo 3 and all in Halo 3 ODST.
the recon helmet for halo 3 is unlocked by completing all of the vidmaster challenges in halo 3 and halo odst
Halo 3 recon was never officially released it is thought though that it was the original name for Halo 3 ODST
No, except for the hornet ..
No all 1000 need to be on halo 3
By getting halo 3 odst ( two discs ) first disc halo 3 odst campaign and 2nd disc halo 3 mythic comes with all the halo 3 maps.
There are not any avatar awards for Halo 3.
Yep.
http://hubpages.com/hub/Halo-3-Armor