Beast Wars Transformers - 1996 is rated/received certificates of: Australia:G (some episodes) Australia:PG (some episodes) Singapore:PG USA:TV-Y7
Beast Machines Transformers - 1999 Survivor 1-10 was released on: USA: 27 November 1999
Beast Machines Transformers - 1999 Master of the House 1-2 was released on: USA: 25 September 1999
Beast Machines Transformers - 1999 Revelations I Discovery 1-7 was released on: USA: 30 October 1999
Beast Machines Transformers - 1999 Revelations II Descent 1-8 was released on: USA: 6 November 1999
"Beast Wars: Transformers" premiered first, debuting on September 16, 1996. It was followed by "Beast Machines," which aired later, starting on September 3, 1999. "Beast Machines" serves as a direct sequel to "Beast Wars."
Beast Machines Transformers - 1999 A Wolf in the Fold 2-5 was released on: Canada: 8 March 2000 USA: 9 September 2000
Beast Machines Transformers - 1999 Spark of Darkness 2-10 was released on: Canada: 12 April 2000 USA: 28 October 2000
Beast Machines Transformers - 1999 Home Soil 2-6 was released on: Canada: 15 March 2000 USA: 16 September 2000
Beast Machines Transformers - 1999 Revelations Part 3 Apocalypse 1-9 was released on: USA: 13 November 1999
Beast Machines Transformers - 1999 Techno-Organic War I The Key 1-11 was released on: USA: 4 December 1999
It stands for Generation One you clonk! Well, originally it was just The Transformers. G1 was added after Beast wars and Beast Machines, to set it apart from those generations.