Quoted from fumbleflippers:Stargate has to be high on that list
Stargate clocks in at 8 multiballs.
*4 multiball modes via the pyramid
*The Sarcophagus starts the main multiball mode
*Eye of Ra multiball after completing all six rounds
*Stargate multiball after completing the Stargate
*Sandstorm multiball after collecting all the transporter awards.