>>24625399 (OP)
"So I'm a Spider, so what?" still has some of these tropes but generally puts an interesting twist on the genre.
I read it a few years ago so I forgot some details, but I remember the explanation for the game-like system being that the gods are using it to harvest the soul power of all living creatures part of the system by absorbing all the skills they accumulated at death and reincarnating them to start anew.
The main factions are the demon lord, who wants to destroy humanity as revenge for them taking advantage of her favorite Goddess and potentially save the Goddess, the main character who got reincarnated into the world with her whole classroom and wants to save them all while also helping the demon lord save the Goddess to repay her debt, the church pope who keeps his memories on reincarnation and wants to save humanity from extinction, not necessarily out of love of humanity, but because of his love for the Goddess. Then the Elf chieftain who is hoarding lost technology and wants to kill the top God and become immortal. He uses metal puppets, armies of droids, runs a human trafficking ring to gather the powerful reincarnated students and info, hides in the forcefield-protected village not-so-subtly based on Israel, and is constantly at odds with both the demon lord and pope. One of the other student reincarnations is the hero, but nobody cares about him and his older brother mogs him anyways. The world is surprising well-thought out.