I don't know when it was invented but halo CE was created November 2001.
Halo was created by Bungie.
2001 with the game Halo Combat Evolved. It was created by the company Bungie.
Bungie. Bungie CREATED it, nobody really INVENTED it.
George bush invented it that why he's awesome
halo 1 CE was made in 1997
Nobody, LEGO Halo doesn't exist.
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
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.