Gantz, Devil Survivor 2 The Animation Recommendations
Two friends have a railway accident and they are brought back to life. And weird things will happen.
In both series, there is a theme of survival in an hostile environment. Faced with danger, the main characters must learn to survive given their new circumstances.
It's also worth noting that both series all began in an underground railway system.
Both series contains plenty of action, drama, and has a dark tone to the backgrounds of the story. The main male protagonist also seems to be stressed about his current situation as well as those around him, especially those who lost their lives.
Both series contains supernatural themes involving demons and supernatural beings.
Both have supernatural survival themes, with great action and drama, where some chosen ones that died see themselves on a unknown situation, and can trade points of monsters that they killed for new powers and etc. Apart of that, if u watch the first episode, u gonna see a great similarity on a certain scene~