Last Armageddon

In the post-apocalyptic world, humans died out and were replaced by all sorts of hell monsters. They lived their lives, but suddenly aliens landed from the sky and declared a war of annihilation. So if you play for the monsters, you'll have to deal with the green men (well, and generally find out what's what in this world). The gameplay of the game is a JRPG with a big dose of "dungeon crawler" - the nerdiness is amplified. There is also a time and date change in the game, which means that the composition of the monster squad is constantly changing.