Some thought processes from across the multiverse, and just how they’ve turned out in the end.
Athanatism: practiced by the halflings on Taqqiq and Aihimavik, but also by others of different races; worship of nine deities in charge of exploring the cosmos, “spirit guides” if you will, some reincarnating as avatars, others reforming their bodies, and one who never dies. Following these provides a pathway to immortality of a sort, although the process is of course a little tricky on occasion.
The Faith of the Elements: practiced by various races of the world of Redfall, worshipping manifestations of the Five Elements and trying like anything to ignore Chaos and Order, who frankly are not particularly friendly individuals.
Guandunianism: practiced by the Hercuans (Crusaders) of Ajjamah, with one God but multiple different interpretations between the six or seven Churches, each of whom control a specific part of the empire and elect a council to lead them as a whole (which in turn chooses a Proxy to act as direct representative of God and His son Guanduño on Ajjamah). Boasts one of the largest empires in the world.
Jatimataism: practiced by the elves on Taqqiq and Aihimavik, with five classes of spiritual being to call on and/or exorcise (angels, saints, jinn, malefactors, and demons) and seven Spheres of Influence (light, life, knowledge, nature, war, trickery, and death).
Qhuric Heterodoxy: the brand of Christianity practiced by the Qhur, with all sorts of pagan fetishes, heretical gospels, and a subculture of talismans (mikharat).
Salvian Polytheism: not so much a religion as a power grid, practiced by the Salvians (Sorcerers) of Ajjamah. Each god (or aspect of a god) grants access to a specific spell formed over the centuries, and worship of that god provides one with access to that spell for a time. In exchange, part of your soul is to be given to the god upon your death so that they may live on.