|I can explain this, great Kami! This is nothing more than… a stub.|
The Altar is the place where all the offerings to the Almighty from the Patapon tribe are stored. It is basically the player's inventory. It lists what items have been obtained, such as weapons and key items (drums, songs, etc) as well as materials and the quantity of Ka-ching available.
In Patapon 2 it is also a place to view your Tips.The Altar does not appear in Patapon 3, but is replaced by the Armory.