Another fun religion to make video games about would be Mormonism.

>cricket locust miracles

>pilgrimages to Utah

>treasure hunts

>white Indians

>gods on other planets

>harems for the reluctant prophet


lds believed joseph smith would come back in 1891 with Jesus which was a failed prophecy but they kept believing. A developer could explore a mythological reason for why he didn't come back. Maybe Joseph Smith is still on an adventure to break the gatea of hell.