bungie did
Halo Reach, Halo: Combat Evolved, Halo 2, Halo 3: ODST, and Halo 3 were made by Bungie; Halo: Wars was created by Ensemble Studios; Halo: Combat Evolved Anniversary and Halo 4 were created by 343 Interactive
A Hawk is not from Halo 3 it is from the game Halo Wars which is not associated with Bungie. Halo Wars Ensemble Studios created the Hawk. You may be thinking of the Hornet or Pelican.
When Halo 3 was formed.
if you mean in forge, then no.
halo 3 obviously
343 studios have taken over the rights to halo and will be making Halo 4 and potentially more games after that. Bungie created Halo:CE, Halo 2, Halo 3, Halo ODST, Halo Wars and Halo:Reach.
Halo 3: ODST is the newest of the two, but not the newest Halo game.
Halo Burger was created in 1923.
JJ Halo was created in 2009.
Halo of Flies was created in 1986.
Luna Halo was created in 1999.
Halo effect was created in 1920.