The promotion plays off how Age of Empire game CDs used to come included with cereal boxes decades ago.
The WOLOL-O's cereal is not going on sale commercially, but Xbox ANZ is offering some cereal boxes through a giveaway on the Xbox ANZ Facebook page (you need to live in Australia or New Zealand to win).The bundle comes not only with the cereal but also a 12-month Xbox Game Pass subscription and a CD with the Age of Empires II soundtrack.
Age of Empires IV launches on October 28 for PC--it's included with Xbox Game Pass